Ergothioneine for Skin Health

Research suggests that ergothioneine, when used as part of a multi-ingredient topical skincare formulation, may support skin recovery and help reduce markers of skin stress such as transepidermal water loss, redness, and dryness. The available evidence consists of a single small uncontrolled observational study conducted in 35 Chinese women following a light-based aesthetic procedure, which reported modest but notable improvements across several measured skin parameters over four weeks. However, because ergothioneine was studied alongside other active ingredients including rhodophyceae extract and L-carnosine, and because the study lacked a control group, it is not possible to attribute the observed effects to ergothioneine specifically or to rule out a placebo effect. The remaining linked studies were either unavailable or unrelated to skin health, meaning the current body of usable evidence is quite limited, and more rigorous controlled trials isolating ergothioneine's contribution would be needed before drawing firm conclusions.