Seaweed Good Plant extracts Anti-Ageing Hydration Soothing Seaweed description Group of sea plants (scientific name: algae) of all sizes and shapes, and having a gelatin-like consistency. Many seaweeds have antioxidant and skin-soothing properties, but many other claims of benefits are not proven or only apply to the plant as it exists in its natural environment, not mixed into a cosmetic product. Related ingredients: Algae