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
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.
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