Macrocystis Pyrifera (Kelp) Extract Good Antioxidant Anti-Ageing Soothing Hydration Macrocystis Pyrifera (Kelp) Extract description _Macrocystis pyrifera_ (kelp) extract is a type of seaweed rich in multiple beneficial ingredients. Its primary value in skin care comes from its antioxidant properties. Related ingredients: Kelp Extract