Microalgae are naturally designed to resist several environmental aggressions. They produce pigments as sun-blockers; several metabolites to fight bacteria and virus; polysaccharides to protect themselves from outer menaces. Cosmetologists have long exploited these benefits in cosmetic formulations.
Microalgae are usually used in the form of extract, and can be mainly found in face and skin care products (anti-aging creams, refreshing or regenerative care products, emollient and as an anti-irritant). Microalgae are also introduced in formulation of sun protection and hair care products.