Cosmetics Ingredient Dictionary

algae. Algae are very simple, chlorophyll-containing organisms in a family that includes more than 20,000 different known species. A number of species have been used for drugs, where they work as anticoagulants, antibiotics, antihypertensive agents, blood cholesterol reducers, dilatory agents, insecticides, and anti-tumorigenic agents. In cosmetics, algae act as thickening agents, water-binding agents, and antioxidants. Some algae are also potential skin irritants. For example, the phycocyanin present in blue-green algae has been suspected of allergenicity and of causing dermatitis on the basis of patch tests (Source: Current Issues in Molecular Biology, January 2002, pages 1–11). Other forms of algae, such as Irish moss and carrageenan, contain proteins, vitamin A, sugar, starch, vitamin B1, iron, sodium, phosphorus, magnesium, copper, and calcium. These are all beneficial for skin, either as emollients or antioxidants (Source: Journal of Agricultural Food Chemistry, February 2002, pages 840–845). However, the claims that algae can stop or eliminate wrinkling, heal skin, or provide other elaborate benefits are unsubstantiated.