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
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.
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