IngredientsProtein ingredient glossary.

Our ingredient glossary includes common protein powder ingredients, their purpose, and safety recommendations based on our research. Empowering you to make informed product choices is our goal. While we do provide a recommendation, you should always discuss using a new supplement with a healthcare professional.
SAFE
CAUTION
AVOID
A
Acacia gum
Emulsifier, Stabilizer, Thickener
Additive Number: 414
Synonyms: Gum arabic
Acacia gum, a natural soluble fiber derived from the Acacia Senegal tree, is a common thickener, emulsifier, stabilizer, and prebiotic in protein powders.
Acesulfame potassium
Sweetener (non-nutritive)
Additive Number: 950
Synonyms: Acesulfame, Acesulfame K, Ace K
Acesulfame potassium (Ace-K) is a calorie-free artificial sweetener used in protein powders, commonly combined with other sweeteners, with a sweeter taste than sugar.
Agave Inulin
Prebiotic / Probiotic
Synonyms: Chicory inulin, Agave fructan
Agave inulin is a soluble fiber extracted from the blue agave plant, used in protein powders as a natural sweetener with a lower glycemic index than sugar.
Algal oil
Nutrient
Synonyms: Algae oil, DHA oil
Algal oil, derived from algae, is added to protein powders as a plant-based source of omega-3 fatty acids, commonly EPA and DHA, essential for cognitive function and overall health.
Alkalized cocoa powder
Flavoring (natural)
Additive Number: 501
Synonyms: Dutch-processed cocoa, Alkalized cocoa
Alkalized cocoa powder is a cocoa powder that has been treated with an alkalizing agent to reduce its acidity. It is often used in protein powders to add a chocolatey taste, particularly in vegan or plant-based protein powders.
Allulose
Sweetener (non-nutritive)
Synonyms: D-psicose, D-allulose
Allulose is a low-calorie sweetener found naturally in some fruits. It's used as a natural alternative to sugar or artificial sweeteners in protein powders to enhance taste without adding extra calories.
Alpha-galactosidase
Digestive enzyme
Synonyms: Beano, Alpha-galactosidase enzyme
Alpha-galactosidase is an enzyme that breaks down complex carbohydrates found in beans, lentils, and other foods. It can improve digestion and absorption of protein in protein powders, especially for those with difficulty digesting certain carbs.
Amaranth flour
Protein source
Synonyms:  Amaranth grain, Pseudo-cereal
Amaranth flour is made from a gluten-free pseudocereal and is rich in protein, fiber, iron, magnesium, and calcium. It's added to protein powders as a plant-based protein source and to boost the nutritional profile.
Aminogen
Digestive enzyme
Aminogen is a blend of digestive proteases added to protein powders and supplements. It is claimed to enhance protein digestion and absorption, reduce bloating, and improve muscle recovery and growth.
Ammonium bicarbonate
Acidifier / Acidity regulator
Additive Number: 503
Synonyms: Baking ammonia
Ammonium bicarbonate is a leavening agent used in baking to help dough or batter rise. In protein powders, it's used as a processing aid or pH adjuster to maintain desired texture and flavor.
Amylase
Digestive enzyme
Additive Number: 1100
Amylase is an enzyme found in the human body and in various foods, and is added to protein powders to improve the digestibility and absorption of carbohydrates.
Synonyms: Caffeine powder
Anhydrous caffeine, a powdered form of caffeine used to increase energy and focus, is sometimes added to protein powders to enhance athletic performance.
Apple fiber
Fiber source
Synonyms: Apple pomace fiber, Apple peel fiber
Apple fiber is a soluble fiber derived from apples that can help regulate digestion and promote feelings of fullness. It is commonly added to protein powders to improve texture and nutritional content.
Arabinogalactan
Prebiotic / Probiotic
Synonyms: Larch arabinogalactan
Arabinogalactan, a complex carbohydrate found in plants, is used in protein powders due to its potential immune-enhancing properties, ability to stimulate beneficial gut bacteria, and support digestive health.
Synonyms: Arrowroot starch, Maranta arundinacea
Arrowroot powder, a gluten-free and low-calorie alternative to other thickening agents, is commonly used in the food industry and as an ingredient in some protein powders and supplements.
Artificial flavor
Flavoring (artificial)
Artificial flavors are synthetic chemicals created in a lab to mimic natural flavors and enhance the taste of protein powders.
Additive Number: 300
Synonyms: Vitamin C, L-ascorbic acid
Ascorbic acid, or vitamin C, is a water-soluble vitamin found naturally in fruits and vegetables. It acts as an antioxidant, aids in collagen synthesis, and enhances iron absorption.
Ascorbyl palmitate
Antioxidant, Preservative
Additive Number: 304
Synonyms: Vitamin C ester, Ascorbyl palmitate ester
Ascorbyl palmitate is a fat-soluble form of vitamin C used as an antioxidant and preservative in food and supplements to protect cells from free radical damage and prevent spoilage.
Aspartame
Sweetener (non-nutritive)
Additive Number: 951
Synonyms: APM, N-(L-alpha-Aspartyl)-L-phenylalanine 1-methyl ester
Aspartame, a low-calorie artificial sweetener, is used in protein powders, diet sodas, and other food and beverage products. It is made up of two amino acids and is approximately 200 times sweeter than sugar.
Synonyms: Milkvetch root, Huang Qi
Astragalus root extract is commonly used in traditional Chinese medicine and is believed to have immune-boosting properties. It may reduce inflammation, improve heart function, and enhance immune system function.
B
Bacillus coagulans
Prebiotic / Probiotic
Synonyms: Lactobacillus sporogenes, BC-30
Bacillus coagulans is a type of probiotic bacteria that is believed to have various health benefits. It may improve digestive health, reduce inflammation, boost immune system function, and enhance athletic performance.
Barley grass
Nutrient
Synonyms: Hordeum vulgare
Barley grass is a nutrient-dense ingredient used in many protein powders due to its vitamins, minerals, and antioxidants. It may support digestion, boost immune system function, and reduce inflammation.
Beta-carotene
Coloring agent
Synonyms: Provitamin A
Beta-carotene, a pigment and a member of the carotenoid family found in plants, is a common ingredient in many protein powders. It promotes healthy vision, supports the immune system, and reduces the risk of certain chronic diseases.
Beta-glucan
Fiber source
Synonyms: Yeast beta-glucan, Beta-1,3/1,6-glucan
Beta-glucan, a soluble fiber found in grains and mushrooms, is a common ingredient in protein powders due to its potential health benefits. It supports immune system function, promotes heart health, and improves blood sugar control.
Synonyms: Plant sterol, Phytosterol
Beta-sitosterol, a plant sterol found in nuts, seeds, and fruits, is commonly used in protein powders due to its potential health benefits. It promotes heart health, supports immune system function, and reduces inflammation.
Betaine
Nutrient
Synonyms: Trimethylglycine, TMG
Betaine, a natural compound found in various foods, is commonly used in dietary supplements due to its potential health benefits. It may support liver health, improve athletic performance, and reduce the risk of certain chronic diseases.
Bifidobacterium bifidum
Prebiotic / Probiotic
Synonyms:  B. bifidum
Bifidobacterium bifidum is a probiotic bacteria that is commonly used in dietary supplements for its potential benefits, including supporting digestive health, boosting the immune system, and improving nutrient absorption.
Bifidobacterium lactis
Prebiotic / Probiotic
Bifidobacterium lactis, a probiotic bacteria commonly found in the human gut, is added to protein powders to support gut health and improve digestion.
Synonyms:  Vaccinium myrtillus extract
Bilberry extract, derived from the fruit of the bilberry plant, is a dietary supplement with potential health benefits, such as improving vision, reducing inflammation, and supporting cardiovascular health.
Bioflavonoids
Antioxidant
Synonyms: Flavonoids, Flavonols
Bioflavonoids, a group of plant compounds with antioxidant properties commonly found in fruits and vegetables, are often included in protein powders to reduce inflammation, support cardiovascular health, and to improve immune function.
Synonyms: Ribes nigrum extract
Black currant extract, derived from the black currant plant, is an antioxidant, and is commonly added to protein powders. It has anti-inflammatory and antioxidant properties, and may help blood flow and reduce the risk of heart disease.
Synonyms: Vaccinium angustifolium extract
Blueberry extract, derived from the berries of the blueberry plant, is a natural source of antioxidants, flavonoids, and anthocyanins, commonly used in protein powders.
Bovine colostrum
Protein source
Synonyms: Cow colostrum, Bovine first milk
Bovine colostrum is a protein-rich supplement derived from the first milk of cows. It contains immunoglobulins that can boost the immune system and growth factors that promote tissue growth and repair.
Synonyms: Ascophyllum nodosum extract, Fucus vesiculosus extract
Brown seaweed extract, derived from brown seaweed, is a common ingredient in protein powders due to its high antioxidant content. It has potential to aid in weight management, improve gut health, and reduce inflammation.
Butyrate
Nutrient
Synonyms: Butyric acid, Tributyrin
Butyrate, a short-chain fatty acid produced in the colon, is found in some protein powders due to its potential to improve gut health and reduce inflammation.
C
Calcium caseinate
Protein source
Calcium caseinate (otherwise known as casein), a slow-digesting protein derived from milk and is commonly found in protein powders and supplements due to its high amino acid content.
Additive Number: 341
Synonyms: Monocalcium phosphate, Dicalcium phosphate, Tricalcium phosphate
Calcium phosphate, is commonly added to protein powders as a mineral supplement. Calcium plays a crucial role in bone health, muscle contraction, and nerve function, while phosphorus is important for healthy bones, teeth, and metabolism.
Carrageenan
Thickener
Additive Number: 407
Synonyms: Irish moss extract
Carrageenan is a red seaweed-derived polysaccharide used as a thickener, stabilizer, and emulsifier in protein powders to improve texture and mouthfeel.
Cellulase
Digestive enzyme
Cellulase is an enzyme that breaks down cellulose in plant cell walls and is used in the food industry as a processing aid. It is also added to some protein powders to improve the bioavailability and digestibility of plant-based proteins.
Cellulose gum
Thickener
Additive Number: 466
Synonyms: Carboxymethyl cellulose, Sodium carboxymethyl cellulose
Cellulose gum, also known as carboxymethyl cellulose, is a thickening agent, stabilizer, and emulsifier derived from cellulose used in protein powders to improve texture and prevent clumping.
Chlorella
Nutrient
Synonyms: Chlorella pyrenoidosa, Freshwater algae
Chlorella, a freshwater green algae, is used in protein powders due to its high protein content and beneficial nutrients. It has been studied for potential health benefits, including improved cholesterol levels, blood sugar control, and immune function.
Chlorophyll
Coloring agent
Synonyms: Chlorophyllin
Chlorophyll, a green pigment found in plants and algae, is used as a natural colorant in protein powders and marketed as a health supplement for potential benefits such as wound healing and reducing inflammation.
Synonyms: Vitamin D3
Cholecalciferol, also known as vitamin D3, is a fat-soluble vitamin important for bone health, immune function, and other health benefits. Cholecalciferol is commonly added to protein powders as a source of vitamin D.
Chromium chloride is a mineral compound that plays an important role in regulating blood sugar levels and metabolism. It is sometimes added to protein powders to improve absorption.
Synonyms: Chromium polynicotinate
Chromium picolinate is added to protein powders to enhance weight loss and improve blood sugar control. It's an essential mineral that plays a key role in insulin signaling and glucose metabolism.
Citric acid
Acidifier / Acidity regulator
Additive Number: 330
Synonyms: 2-hydroxypropane-1,2,3-tricarboxylic acid
Citric acid is used as a natural preservative, flavor enhancer, and pH adjuster in protein powders.
Cocoa powder
Flavoring (natural)
Synonyms: Chocolate powder, Cacao powder
Cocoa powder is derived from cocoa beans and is used in protein powders for its rich chocolate flavor and health benefits. It contains antioxidants and is a source of magnesium, which is important for muscle function and blood sugar control.
Creatine
Nutrient
Synonyms: Creatine monohydrate, Creatine phosphate
Creatine is a naturally occurring organic acid that supplies energy to muscle cells during high-intensity exercise. It is a popular ingredient in protein powders to improve athletic performance, increase muscle mass, and reduce muscle damage.
Curcumin
Mineral
Synonyms: Turmeric extract, Curcuma longa
Curcumin is a natural compound found in turmeric that is believed to have anti-inflammatory and antioxidant properties. It is sometimes added to protein powders to reduce muscle soreness and promote muscle recovery after exercise.
Synonyms: Vitamin B12
Cyanocobalamin is a synthetic form of vitamin B12 used in supplements and protein powders as a source of vitamin B12, particularly in vegetarian and vegan products.
D
Synonyms: Pantothenic acid, Vitamin B5
D-calcium pantothenate, a form of vitamin B5, is commonly added to dietary supplements and protein powders due to its role in the metabolism of proteins, carbohydrates, and fats.
D-Ribose
Nutrient
Synonyms: Ribose
D-Ribose is a natural sugar molecule that aids in energy production in the body. Studies suggest it may enhance exercise endurance and recovery time.
Dextrin
Thickener
Synonyms: Soluble fiber, Resistant dextrin
Dextrin is a carbohydrate obtained from corn, wheat, or potato and used in the food industry as a thickener, stabilizer, and bulking agent, including protein powders.
Dextrose
Sweetener (nutritive)
Synonyms: Glucose, Corn sugar
Dextrose or glucose is a simple sugar derived from corn and used as a sweetener in many food products, sports drinks, and protein powders due to its ability to quickly boost blood sugar levels.
Dimethylpolysiloxane
Anti-foaming agent
Additive Number: 900
Dimethylpolysiloxane is a synthetic silicone-based polymer commonly used as an anti-foaming agent in some protein powders. It prevents foaming and ensures consistency during manufacturing, making it easier to mix and dissolve.
E
Synonyms: Purple coneflower extract
Echinacea purpurea extract is a supplement derived from a flowering plant native to North America, used to boost the immune system and alleviate cold and flu symptoms due to its anti-inflammatory and immunomodulatory effects.
Ellagic acid
Antioxidant
Ellagic acid is a naturally occurring polyphenolic compound found in certain fruits and vegetables, studied for its antioxidant, anti-inflammatory, and anticancer effects. It's included in some protein powders due to its potential health benefits.
Erythritol
Sweetener (non-nutritive)
Additive Number: 968
Erythritol is a low-calorie sweetener derived from natural sources and commonly used in protein powders to enhance taste and flavor.
Ethyl vanillin
Flavoring (artificial)
Synonyms: Artificial vanilla flavor
Ethyl vanillin is a synthetic flavoring agent used in protein powders to enhance taste and aroma.
F
Synonyms: Iron fumarate
Ferrous fumarate is a form of iron commonly used in protein powders to address iron deficiency anemia and support energy metabolism in athletes.
Folic acid
Vitamin
Synonyms: Folacin, Vitamin B9
Folic acid is a synthetic form of vitamin B9 essential for the formation of new cells, proper brain function, and the production of neurotransmitters.
Fructooligosaccharides
Prebiotic / Probiotic
Fructooligosaccharides (FOS) are a prebiotic fiber naturally found in certain fruits and vegetables that are added to protein powders to support digestive health and improve gut function by stimulating the growth of beneficial gut bacteria.
Fructose
Sweetener (nutritive)
Synonyms: Fruit sugar
Fructose is a simple sugar that is naturally found in many fruits. It is used as a sweetener in some protein powders to enhance flavor.
Fucoxanthin
Nutrient
Synonyms: Marine carotenoid
Fucoxanthin, found in brown seaweed and marine organisms, is added to some protein powders as an antioxidant. It has potential anti-inflammatory and anti-obesity effects, reducing inflammation and promoting weight loss.
Fulvic acid
Nutrient
Synonyms: Fulvic minerals
Fulvic acid, a naturally occurring organic acid found in soil and water, is added to some protein powders as a source of trace minerals and electrolytes. It can also have potential antioxidant and anti-inflammatory effects.
Fumaric acid
Acidifier / Acidity regulator
Synonyms: Trans-butenedioic acid
Fumaric acid, found in many fruits and vegetables, is added to some protein powders as a source of acidity and preservative.
G
Gluconic acid
Acidifier / Acidity regulator
Synonyms:  D-gluconic acid
Gluconic acid, produced by the fermentation of glucose, is added to some protein powders as a source of acidity and preservative.
Glucono delta-lactone
Acidifier / Acidity regulator
Glucono delta-lactone (GDL) is a natural acid commonly used in food products, including some protein powders, as a source of acidity to enhance taste.
Glucosamine sulfate, a naturally occurring amino sugar found in shellfish and fungi, is used in some protein powders for its potential health benefits. It can act as a natural anti-inflammatory to reduce joint pain and inflammation.
Guar gum
Thickener
Additive Number: 412
Guar gum, derived from the seeds of the guar plant, is a type of soluble fiber used in some protein powders as a thickening agent to improve texture and mixability.
H
Hesperidin
Antioxidant
Synonyms: Bioflavonoid
Hesperidin, a flavonoid found in citrus fruits, is used in some protein powders as a natural antioxidant and anti-inflammatory agent.
Hyaluronic acid is a natural substance found in the body and is sometimes added to protein powders for its potential health benefits, including supporting overall health and well-being and improving skin health.
Synonyms: Calcium hydroxyapatite
Hydroxyapatite is a naturally occurring mineral found in bone tissue and teeth, and it is sometimes added to protein powders for its potential health benefits. It is a source of calcium and phosphorus, which are essential minerals for bone health.
Hydroxypropyl cellulose is a modified form of cellulose found in plants, and it is used as a stabilizer and thickening agent in various food and cosmetic products, including some protein powders.
Hydroxypropyl methylcellulose is a modified form of cellulose found in plants and used as a thickening agent, emulsifier, and binder in various food and pharmaceutical products, including some protein powders.
I
Inositol
Nutrient
Additive Number: 980
Synonyms: Myo-inositol
Inositol is a naturally occurring carbohydrate found in many foods and sometimes added to protein powders. It is involved in neurotransmitter production, supports healthy liver function, improves insulin sensitivity, and aids in the breakdown of fats.
Iodine
Mineral
Synonyms: Potassium iodide
Iodine is a trace element essential for thyroid function, regulating metabolism, growth, and development. It may be added to protein powders as a nutritional supplement, particularly in plant-based sources which may be lower in iodine.
K
Kaempferol
Nutrient
Synonyms: 3,5,7-Trihydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-one
Kaempferol is a natural flavonoid with antioxidant and anti-inflammatory properties, found in many plants. It can be added to protein powders to improve heart health, support the immune system, and reduce oxidative stress.
L
Lactase
Digestive enzyme
Lactase is an enzyme that breaks down lactose into glucose and galactose, making it easier to digest milk and dairy products. It can be added to protein powders as a digestive aid, especially for individuals with lactose intolerance.
Lactobacillus acidophilus
Prebiotic / Probiotic
Lactobacillus acidophilus is a type of friendly bacteria naturally found in the gut, and may be added to protein powders as a probiotic supplement.
Lactobacillus bulgaricus
Prebiotic / Probiotic
Lactobacillus bulgaricus is a friendly bacteria used in foods. It can be added to protein powders as a probiotic to support gut health, improve digestion, boost the immune system, and maintain a healthy balance of bacteria in the gut.
Lactobacillus casei
Prebiotic / Probiotic
Lactobacillus casei is a friendly bacteria commonly found in the human gut and some fermented foods, and can be added to protein powders as a probiotic supplement.
Lactobacillus plantarum
Prebiotic / Probiotic
Lactobacillus plantarum is a friendly bacteria found in the human gut and some fermented foods, and can be added to protein powders as a probiotic supplement.
Lactoferrin
Nutrient
Lactoferrin is a protein found in milk, known for its antimicrobial properties and ability to transport iron. It may be added to protein powders to support immune function and overall health, as well as having anti-inflammatory properties.
Lecithin
Emulsifier
Additive Number: 322
Synonyms: Soy Lecithin, Sunflower Lecithin
Lecithin, a phospholipid extracted from soybeans and eggs, is used as an emulsifier in protein powders to improve mixability and prevent clumping.
Lipase
Digestive enzyme
Additive Number: 1104
Lipase is added to protein powders to aid in the digestion and absorption of fats and oils present in the powder. This can benefit those who have difficulty digesting fats or have a high-fat diet.
Lycopene
Antioxidant, Coloring agent
Additive Number: 160d
Lycopene is added to protein powders as a supplement to support overall health and provide antioxidant protection. It can help protect cells from damage caused by free radicals, which can contribute to chronic diseases.
M
Malic acid
Acidifier / Acidity regulator
Additive Number: 296
Malic acid is added to protein powders to enhance flavor and balance the pH of the product. It is a naturally occurring organic acid found in many fruits.
Maltodextrin
Thickener
Maltodextrin is added to protein powders as a source of carbohydrates to provide energy or muscle recovery.
MCT powder
Nutrient
Synonyms: Medium-chain triglyceride powder
MCT powder is a dietary supplement that contains medium-chain triglycerides, which are metabolized differently than other dietary fats. It is used to support weight loss, increase energy and athletic performance.
Monk fruit extract
Sweetener (non-nutritive)
Synonyms: Luo han guo
Monk fruit extract is a natural, calorie-free sweetener derived from the monk fruit. It is used in protein powders as a sugar substitute to enhance the taste without adding extra calories or carbohydrates.
N
Neotame
Sweetener (non-nutritive)
Additive Number: 961
Neotame is a non-nutritive artificial sweetener that is used as a sugar substitute in various food and beverage products, including protein powders.
Niacin
Vitamin
Additive Number: 234
Synonyms: Vitamin B3, Nicotinic acid
Niacin, a water-soluble vitamin, is commonly added to protein powders due to its role in healthy metabolism and energy production. It also supports healthy skin, nerves, and digestion.
Synonyms: Nicotinamide, Vitamin B3
Niacinamide, a form of vitamin B3, is included in protein powders due to its involvement in energy production, DNA synthesis, and cellular repair. It supports healthy skin, reducing fine lines, wrinkles, redness, and improving skin elasticity.
Nisin
Preservative
Additive Number: 234
Nisin is a naturally occurring antimicrobial peptide. It is added to protein powders as a natural antimicrobial agent to extend shelf life and reduce the risk of contamination.
Nutriose
Fiber source, Prebiotic / Probiotic
Additive Number: 965
Nutriose, a type of soluble fiber made from corn starch, is added to protein powders to increase fiber content, support digestive health, and promote fullness.
Synonyms: Saccharomyces cerevisiae
Nutritional yeast, known for its savory, umami flavor, is a good source of protein and other nutrients. It's added to protein powders for plant-based protein, vitamins, and minerals.
O
Octacosanol
Nutrient
Synonyms: Policosanol
Octacosanol is a plant-based ingredient that is often used in protein powders to enhance physical performance and endurance. It may enhance oxygen uptake, and reduce oxidative stress and inflammation, improving recovery.
Oligofructose
Prebiotic / Probiotic
Synonyms: Fructooligosaccharides
Oligofructose is a type of soluble fiber found in many plants, included in protein powders to promote the growth of beneficial gut bacteria.
Oligosaccharides
Prebiotic / Probiotic
Oligosaccharides are complex carbohydrates found in plant-based foods, also added to protein powders as prebiotic fibers for gut health.
P
Papain
Digestive enzyme
Synonyms: Papaya proteinase
Papain is a proteolytic enzyme extracted from papaya fruit, used as a digestive aid and added to protein powders to enhance their digestibility.
Paraffin
Stabilizer
Additive Number: 905
Paraffin is a mineral oil derived from petroleum and used in cosmetic and personal care products, including protein powders, as a lubricant and anti-caking agent.
Pectin
Thickener
Synonyms: Fruit pectin, Apple pectin, Citrus pectin, Vegetable pectin
Pectin is a soluble fiber found in fruits and vegetables and is commonly used in protein powders as a thickener. It also has potential health benefits, including promoting digestive health, reducing cholesterol, and supporting blood sugar levels.
Phosphatidic acid (PA) is a phospholipid found naturally in the human body and certain foods. It's used in protein powders to promote muscle growth and athletic performance by stimulating the mTOR signaling pathway.
Phosphatidylcholine (PC) is a phospholipid found in various tissues and cell membranes in the body. In protein powders, it's used to improve liver function, cognitive health, and athletic performance.
Phosphatidylserine (PS) is a phospholipid found in high concentrations in brain tissue. In protein powders, it's used to support cognitive health, improve athletic performance, and reduce muscle soreness and fatigue.
Synonyms: Vitamin K1
Phytonadione or Vitamin K1 is a fat-soluble vitamin found in green leafy vegetables, and is included in protein powders to support bone health and blood clotting.
Phytosterols
Nutrient
Synonyms: Plant sterols
Phytosterols are added to protein powders to benefit athletes by improving endurance and reducing muscle damage and inflammation.
Polydextrose
Fiber source, Thickener
Additive Number: 1200
Polydextrose is a low-calorie source of dietary fiber that is added to protein powders to increase fiber content without affecting taste or texture.
Polyethylene glycol (PEG) is a synthetic polymer used in protein powders as an emulsifier or thickening agent.
Additive Number: 476
Polyglycerol polyricinoleate (PGPR) is an emulsifier used in chocolate and other fatty foods to stabilize fats and oils, creating a smooth texture.
Polysorbate 80
Emulsifier
Synonyms:  Tween 80
Polysorbate 80 is a synthetic emulsifier and stabilizer used in protein powders to improve mixability, texture, and consistency.
Additive Number: 508
Synonyms: Potassium salt
Potassium chloride is a naturally occurring mineral salt used as a substitute for table salt and in protein powders as a source of potassium, which can help support healthy muscle function and reduce the risk of high blood pressure.
Additive Number: 917
Synonyms: Iodine
Potassium iodide is a source of iodine, an essential mineral that regulates metabolism and thyroid function.
Additive Number: 340
Synonyms: Monopotassium phosphate, Dipotassium phosphate, Tripotassium phosphate
Potassium phosphate is a food additive found in many processed foods and used in protein powders as a buffering agent to control pH levels and provide phosphorus, which plays a key role in bone growth, energy production, and DNA synthesis.
Protease
Digestive enzyme
Additive Number: 1101
Synonyms: Papain, Bromelain, Ficin
Protease is an enzyme that breaks down protein molecules into smaller peptides and amino acids, and is naturally found in the body and many foods. It's added to protein powders to aid in digestion and absorption.
Psyllium husk powder
Fiber source, Thickener
Synonyms: Plantago ovata husk powder
Psyllium husk powder is a soluble fiber derived from the seeds of the Plantago ovata plant. It may be added to protein powders to increase fiber content and promote fullness, regulate bowel movements, and improve digestive health.
Synonyms: Vitamin B6
Pyridoxine hydrochloride, also known as vitamin B6, is an essential water-soluble vitamin that plays a role in many physiological processes in the body. It may be added to protein powders to increase their vitamin B6 content.
Pyruvate
Nutrient
Synonyms: Calcium pyruvate
Pyruvate is a naturally occurring molecule involved in energy production. Pyruvate is added to protein powders to improve athletic performance and support weight loss.
Q
Quercetin
Antioxidant, Coloring agent
Quercetin, a flavonoid found in fruits, vegetables, and herbs, is added to some protein powders to potentially support immune function and reduce inflammation due to its antioxidant properties.
Quillaja extract
Foaming agent
Synonyms: Soapbark extract
Quillaja extract, derived from the Chilean soapbark tree, is a natural substance used in protein powders as an emulsifier and foaming agent. It helps to create a smooth texture and creamy protein shakes that are easier to consume.
R
Resveratrol
Antioxidant
Resveratrol, a natural compound found in plants, is added to protein powders due to its potential health benefits, including improving heart health and reducing inflammation. It may also improve exercise performance and reduce muscle damage.
Retinol
Vitamin
Synonyms: Vitamin A
Retinol, a form of vitamin A found in animal-derived foods, is also available in synthetic form as a dietary supplement and is sometimes added to protein powders.
Riboflavin
Vitamin
Additive Number: 101
Synonyms: Vitamin B2, Lactoflavin
Riboflavin, also known as Vitamin B2, is a water-soluble vitamin used in protein powders due to its ability to support energy metabolism and protect against oxidative stress.
Ribonuclease
Digestive enzyme
Synonyms:  RNase
Ribonuclease is an enzyme that is sometimes added to protein powders to aid in the digestion and absorption of protein, potentially increasing the bioavailability of dietary protein and improving protein synthesis.
Ribose
Nutrient
Ribose is a naturally occurring sugar in the body that plays a role in energy metabolism. It is sometimes added to protein powders to help improve athletic performance and reduce muscle fatigue by increasing ATP production in the body.
S
Saccharin
Sweetener (non-nutritive)
Additive Number: 954
Saccharin is a non-nutritive artificial sweetener used in some protein powders. It is much sweeter than sugar and helps reduce calorie and sugar intake.
Silicon dioxide
Anti-caking agent
Additive Number: 551
Synonyms: Silica
Silicon dioxide is a natural compound found in quartz, sand, rocks, and soil. It is used as an anti-caking agent in protein powders to prevent clumping, and as a stabilizer and thickener in food products.
Sodium ascorbate
Antioxidant, Vitamin
Synonyms: Vitamin C
Sodium ascorbate is a form of vitamin C that is added to protein powders to boost their nutritional value. It helps maintain a healthy immune system, supports collagen production, and acts as an antioxidant.
Sodium benzoate
Preservative
Additive Number: 211
Sodium benzoate is a common food preservative used in protein powders to extend shelf life by inhibiting bacterial and fungal growth.
Additive Number: 466
Sodium carboxymethylcellulose (CMC) is a food additive derived from cellulose that is added to protein powders as a thickener, stabilizer, and emulsifier. It improves texture, prevents clumping, and enhances stability.
Sodium caseinate
Protein source
Sodium caseinate (otherwise known as casein) is a milk-derived protein that is often used in protein powders due to its high protein content. It is a slow-digesting protein that provides a sustained release of amino acids into the bloodstream.
Synonyms: Salt, Table Salt
Sodium chloride, or salt, is used in protein powders as a flavor enhancer and to maintain proper fluid balance and blood pressure.
Sodium citrate
Acidifier / Acidity regulator
Sodium citrate, a salt of citric acid, is used in protein powders to regulate pH, improve texture, and prevent spoilage.
Additive Number: 223
Sodium metabisulfite is a food preservative used in protein powders to prevent oxidation and extend shelf life.
Additive Number: 339
Synonyms: Monosodium phosphate, Disodium phosphate, Trisodium phosphate
Sodium phosphate is a salt commonly used as a pH stabilizer and buffering agent in protein powders. It may also serve as a source of dietary phosphorus.
Sodium stearyl fumarate is a food additive used in protein powders as a flow agent to prevent clumping and improve flow.
Additive Number: 491
Sorbitan monostearate is an emulsifier used in protein powders to stabilize the mixture and prevent separation. It also improves texture, giving a more creamy mouthfeel.
Spirulina
Protein source
Spirulina is a blue-green algae used in protein powders for its high protein content and nutrient density, particularly for vegans and vegetarians. Potential benefits include improved immune function and reduced inflammation.
Steviol glycoside
Sweetener (non-nutritive)
Additive Number: 960
Synonyms: Stevia
Steviol glycosides are a low-calorie sweetener extracted from Stevia rebaudiana plant leaves, commonly used in food and beverage products as an alternative to sugar for people with diabetes or watching their weight.
Sucralose
Sweetener (non-nutritive)
Additive Number: 955
Synonyms: Trichlorogalactosucrose
Sucralose, a high-intensity artificial sweetener commonly used in protein powders, is about 600 times sweeter than sugar and has no calories.
T
Tapioca starch, extracted from the cassava root, is a fine, white powder commonly used as a thickening agent in foods and beverages.
Thaumatin
Sweetener (non-nutritive)
Additive Number: 957
Synonyms: Talin
Thaumatin, a natural sweetener extracted from the katemfe fruit, is approximately 2000 times sweeter than sugar and is often used as a low-calorie sweetener in protein powders.
Thiamin
Vitamin
Additive Number: 101
Synonyms: Vitamin B1
Thiamin, a water-soluble vitamin essential for nervous system, muscles and heart, is added to protein powders due to its role in carbohydrate metabolism for energy.
Synonyms: Thiamine mononitrate, Vitamin B1
Thiamine hydrochloride, also known as vitamin B1 hydrochloride, is commonly used in protein powders and dietary supplements due to its role in energy metabolism and nervous system functioning.
Tocopherol
Antioxidant, Vitamin
Additive Number: 307
Synonyms: Vitamin E
Tocopherol, a type of vitamin E, acts as an antioxidant in the body, protecting cells from damage caused by free radicals. It may also have other health benefits, such as reducing the risk of heart disease and certain cancers.
Synonyms: Calcium orthophosphate, Tribasic calcium phosphate
Tricalcium phosphate (TCP), a calcium salt, is commonly used as a nutritional supplement and food additive. It is added to protein powders as a source of calcium, essential for bone, muscle, nerve and cell functioning.
Tri-sodium citrate
Acidifier / Acidity regulator
Synonyms: Sodium citrate tribasic, Citric acid trisodium salt
Trisodium citrate, a salt derived from citric acid, is often used as a food additive and buffering agent. It is added to protein powders to regulate acidity levels, improve stability and enhance flavor.
Tribulus terrestris is a plant commonly used as a natural supplement to enhance athletic performance. It may work by increasing testosterone levels, but the evidence supporting its effectiveness is limited.
Turmeric extract
Antioxidant
Synonyms: Curcumin
Turmeric extract is a natural supplement containing curcumin, known for its anti-inflammatory and antioxidant properties. It is commonly added to protein powders due to its potential health benefits, such as reducing inflammation.
U
Ubiquinone
Nutrient
Synonyms: Coenzyme Q10, Q10
Ubiquinone or CoQ10 is a naturally occurring compound involved in energy production within cells, commonly used in protein powders and supplements.
Uridine
Nutrient
Uridine is a naturally occurring nucleoside that is found in all living organisms. It plays a key role in the synthesis of RNA and DNA, two molecules that are essential for the proper functioning of cells.
Uva ursi
Nutrient
Synonyms: Arctostaphylos uva-ursi
Uva ursi, also known as bearberry, is commonly used in traditional medicine for its potential health benefits. It is often included in protein powders and herbal supplements for its antimicrobial and anti-inflammatory effects.
V
Vanadium
Mineral
Vanadium is a trace mineral that is sometimes included in protein powders and supplements. It may play a role in blood sugar regulation and bone health by mimicking the effects of insulin.
Vanilla extract
Flavoring (natural)
Vanilla extract is a natural flavoring agent derived from the vanilla bean and is commonly used in protein powders and supplements. Vanilla extract contains antioxidants that may help protect the body from damage caused by free radicals.
X
Xanthan gum
Emulsifier, Stabilizer, Thickener
Additive Number: 415
Xanthan gum is a soluble fiber derived from bacterial fermentation and used in protein powders as a thickener and stabilizer to improve texture and consistency.
Xylitol
Sweetener (nutritive)
Additive Number: 967
Synonyms:  Birch sugar
Xylitol is a sugar alcohol used in protein powders as a low-calorie alternative to sugar. It has similar sweetness but fewer calories, and can help reduce tooth decay and cavities.
Xylooligosaccharides
Prebiotic / Probiotic
Xylooligosaccharides (XOS) are a prebiotic fiber found in plant-based foods. XOS are added to protein powders as a dietary fiber to promote beneficial bacteria growth, improve digestive health, mineral absorption, and immune function.
Xylose
Nutrient
Additive Number: 967
Synonyms: Wood sugar
Xylose is a natural monosaccharide found in plants and can be used as a sweetener or flavor enhancer in protein powders and food products. It has a slightly sweet taste similar to glucose but is not as sweet as other sugars.
Y
Yeast extract
Flavoring (natural)
Synonyms: Autolyzed yeast extract
Yeast extract is a food ingredient commonly used as a flavoring agent in protein powders, with a savory umami taste and high levels of B vitamins, essential minerals, and protein.
Yucca extract
Foaming agent
Synonyms: Yucca schidigera extract
Yucca extract is a natural plant extract rich in phytochemicals and used in protein powders for its potential antioxidant, anti-inflammatory, and prebiotic effects.
Z
Synonyms: Zincum gluconicum
Zinc gluconate is a chelated form of zinc commonly used in protein powders for its role in immune function, wound healing, and protein metabolism.
Zinc oxide
Mineral
Synonyms: Zinc white
Zinc oxide is used in protein powders as a source of zinc, which plays a role in protein metabolism and immune function.
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