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.
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CAUTION
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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.
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