Algae probably isn’t the most expected beauty product ingredient. But the ocean can do much more than give you beachy hair: The seaweed found on the bottom of the ocean floor has been shown to benefit skin, and is popping up more frequently in anti-ageing products. Seaweed-infused products can hydrate, reduce inflammation, and stimulate collagen, depending on the type of algae and product. Learn how this marine ingredient powers the latest skincare problem solvers.