The mechanism behind Yeast Extract is precise: Contains beta-glucans, proteins, vitamins B1/B2/B6, minerals; supports collagen; antioxidant. That specificity is what separates it from broader-category ingredients that work in less targeted ways.
The scientific name is Faex / Saccharomyces Cerevisiae Extract. Contains beta-glucans, proteins, vitamins B1/B2/B6, minerals; supports collagen; antioxidant. This mechanism is consistent across properly formulated products, which means the real variable is concentration and delivery system.
Typical working concentration is 0.1–5%. Best suited to all skin types skin. Primary applications: skin conditioning, barrier support, anti-aging, brightening.
Works well with: Niacinamide, peptides.
Also used in Pitera (galactomyces ferment) — base of famous SK-II formula.