Pelvetia Siliquosa Extract

Pelvetia siliquosa extract is derived from a species of brown seaweed found in coastal regions. Like other seaweed extracts used in skincare, it contains naturally occurring compounds including polysaccharides and phenolic compounds that are thought to benefit the skin.In formulations, it functions as an antioxidant and humectant — helping to neutralise free radicals and support the skin's natural moisture retention. It also has skin-protecting properties that may help buffer against environmental aggressors.

The extract's polysaccharides form a light film on the skin's surface, helping to reduce transepidermal water loss and maintain hydration levels. This is the humectant mechanism at work.Its phenolic compounds and other natural constituents act as antioxidants, meaning they can neutralise free radicals — unstable molecules that accumulate from sun exposure, pollution, and normal cellular metabolism. By reducing free radical damage, the extract may help protect against premature ageing and skin irritation.

Pelvetia siliquosa extract is typically found in serums, moisturisers, and toners. It works well layered with other hydrating or antioxidant ingredients, and there are no known restrictions on combining it with common actives. Use it as directed by the product instructions — usually daily as part of your morning or evening routine.

Generally well-tolerated across skin types. May occasionally cause sensitivity in individuals with seaweed or iodine sensitivity; a patch test is advisable if you have known sensitivities.