While marine algae are primarily used for production of
single-cell oil rich in DHA, and other u3 PUFA (Kyle,
2001; Zeller, Barclay, & Abril, 2001), the leftover material
after processing contains a variety of antioxidative substances
that can potentially be utilized as a source of natural
antioxidants. A number of studies evaluating the antioxidant
activity of marine algae have revealed high antioxidant
efficacy of their extracts which is equal to or better than
that of commercial antioxidants such as butylated hydroxyanisole
(BHA), butylated hydroxytoluene (BHT) and a-tocopherol,
and have suggested the use of algal antioxidants
in food formulations