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Skin & hair

Look beyond a label to the ingredients, formulations, and studies behind skincare claims.

A familiar ingredient can come with a big promise. The useful questions start with what was actually tested.

Names you may come across

A short synthetic peptide discussed in studies of tissue repair and the gut. Start with the study setting and its limitations.

A compound related to thymosin beta-4, discussed in research on cell movement and tissue repair.

A copper-binding peptide often discussed in skin research. An ingredient study is not evidence for every finished cosmetic.