Skeletonema Costatum Extract Good Antioxidant Anti-Blemish Anti-Ageing Skeletonema Costatum Extract at a glance From a type of brown micro algae Has antioxidant properties Also soothes skin Could inhibit sebum overproduction Skeletonema Costatum Extract description _Skeletonema costatum_ extract comes from a type of brown micro algae that is found all over the world. As is the case with most other algae-derived ingredients, _Skeletonema costatum_ extract exerts antioxidant properties. This makes it useful for products designed to fight signs of aging caused by free radical damage. Some studies have found that ethanolic extracts of this alga might impact sebum overproduction, often seen in people suffering from acne breakouts. Research also indicates it has skin soothing properties, making it an ingredient to watch, especially as a potential acne treatment alternative. Use levels of _Skeletonema costatum_ extract in cosmetics range from 0.1–0.5%. Related ingredients: Algae Algae Extract