Hydrolyzed Algin

Hydrolyzed algin is a polysaccharide extracted from brown algae and then broken down into smaller molecular fragments. This process makes it easier for the ingredient to interact with skin. In skincare formulations, it functions primarily as a conditioning agent that helps to retain moisture and improve the texture and feel of products.The ingredient is relatively uncommon in skincare, appearing in approximately 0.3% of formulations. Its marine origin and hydrophilic (water-loving) nature make it particularly suited to moisturising and film-forming applications.

Hydrolyzed algin works by forming a thin, protective layer on the skin's surface. This film helps to reduce transepidermal water loss (TEWL), thereby supporting hydration. The ingredient's polysaccharide structure allows it to bind water molecules, creating a humectant effect that draws moisture into the outer layers of skin.Additionally, the hydrolysed form may enhance the ingredient's ability to penetrate or interact more effectively with skin tissue compared to its non-hydrolysed form, though research on this in cosmetic applications remains limited.

Hydrolyzed algin is typically incorporated into serums, moisturisers, and hydrating masks rather than used as a standalone ingredient. It is most effective when applied to damp skin, as this allows it to draw moisture into the skin. It works well in layered routines, particularly under occlusive moisturisers that lock in the hydration it helps deliver.

Hydrolyzed algin is generally well-tolerated and is derived from a natural, edible marine source. No significant safety concerns have been identified in cosmetic use, though those with algae sensitivities should exercise caution.