Laminaria Cloustoni Extract

Laminaria cloustoni extract is derived from a species of brown seaweed (kelp) found in Atlantic waters. The extract is rich in polysaccharides—complex carbohydrates that form the structural backbone of the plant cell wall. When applied topically, these polysaccharides work to reinforce the skin's natural protective mechanisms.In cosmetic formulations, this ingredient functions as a skin protectant, helping to maintain moisture levels and support the skin's barrier function. It is typically incorporated into moisturisers, serums, and treatment products at modest concentrations.

Laminaria polysaccharides function as humectants and film-formers. They draw moisture from deeper skin layers and the environment, then bind water molecules at the surface, creating a hydrating effect. This moisture retention strengthens the skin's barrier function, which naturally becomes less efficient with age and environmental stress.At a cellular level, preliminary research suggests the extract may influence the expression of enzymes involved in collagen breakdown (matrix metalloproteinases) and stress signalling pathways. This may help preserve skin structure and resilience, though hu…

Laminaria cloustoni extract is typically used as part of a moisturiser or serum applied once or twice daily. It works well in formulations combined with other hydrating or barrier-supporting ingredients such as glycerol, ceramides, or hyaluronic acid. Allow 5–10 minutes for absorption before layering additional products.

Laminaria extract is generally well-tolerated across skin types. Those with iodine sensitivity or seaweed allergies should check product labelling, as seaweed-derived ingredients may contain iodine.