Chlorella Sp. Hs2 Extract

Chlorella sp. HS2 is a freshwater microalgae extract derived from a specific strain of chlorella. In skincare formulations, it functions primarily as a skin conditioning agent, working to improve the texture and feel of the skin surface.Microalgae such as chlorella contain a range of bioactive compounds, including proteins, amino acids, vitamins, and polysaccharides. These components are thought to contribute to the ingredient's conditioning properties, though the specific mechanisms in cosmetic applications remain an area of ongoing research.

Chlorella extract conditions the skin through a combination of mechanisms. The amino acids and proteins in the extract form a protective layer on the skin surface, which can improve hydration retention and skin feel. Polysaccharides present in the algae may also enhance the skin's natural moisture-binding capacity.Additionally, the antioxidant compounds found in chlorella—such as chlorophyll and carotenoids—may help neutralise environmental stressors, though the extent to which these remain bioavailable in finished skincare products requires further evaluation.

Chlorella extract is most commonly found in moisturisers, serums, and hydrating masks rather than active treatment products. It works well as part of a layered skincare routine and can be used alongside other conditioning ingredients. There is no specific evidence suggesting it should be used at particular times of day or avoided in combination with other actives.

Chlorella sp. HS2 extract is generally well-tolerated and considered safe for topical use in cosmetics. Those with known sensitivities to algae-derived ingredients should patch test first.