Cystoseira Compressa Extract

Cystoseira compressa is a brown seaweed (macroalga) native to Atlantic coastal waters. The extract is derived from this species and contains polysaccharides, phenolic compounds, and other bioactive constituents typical of marine algae.In skincare formulations, cystoseira compressa extract functions primarily as a humectant and antioxidant, helping to draw moisture into the skin and protect against environmental stressors. It also has mild conditioning properties that can support skin softness and texture.

The polysaccharides in cystoseira compressa extract form a humectant layer on the skin surface, binding water molecules and improving hydration. This mechanism is similar to other seaweed-derived ingredients and does not require penetration into deeper skin layers.The phenolic and antioxidant compounds in the extract work by neutralising reactive oxygen species (free radicals) that can damage skin cells and accelerate visible ageing. This protective action takes place both on the skin surface and, to a limited extent, in the upper epidermis.

Cystoseira compressa extract is typically found in rinse-off products (cleansers, masks) or leave-on formulations such as serums and moisturisers. No specific usage restrictions apply; it can be used daily as part of a routine skincare regimen. Combine with a broad-spectrum sunscreen for optimal antioxidant benefit when using during daytime routines.

Cystoseira compressa extract is generally well-tolerated and has a low sensitisation potential. Those with iodine sensitivities should be aware that seaweed extracts may contain trace iodine, though concentrations in cosmetics are typically negligible.