28+ Algae Extract US . It is used in cosmetics products. It helps the skin to attract water and acts as a humectant. Alterna Caviar CC Cream Review: Strengthen Damaged Hair ... from www.futurederm.com It is claimed they also have antioxidant. The official description in the europiean cosmetic ingredient listing is this. Algae are photosynthetic organisms that occur in most habitats. You can purchase this red algae extract product for 79 dollars. The official description in the europiean cosmetic ingredient listing is this. Seaweed extracts are also capable of prolonging partial thromboplastin time, prothrombin time, and thrombin time and thus reducing the risk of cardiovascular disease 89,92. So, algae extract can be anything from la mer's miracle broth to a simple brown algae extract that helps to smooth the hair. It also has wrinkle prevention properties and hydrates the skin.