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

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.

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