The antioxidant role of natural drugs has been well studied
because they have a good antiradical activity and they can
inhibit lipid peroxidation [8]. Marine organisms possess a
great taxonomic diversity. Their metabolites with different
structures present biological activities for food, cosmetics,
biotechnology, and pharmacy. Among algae, red algae represent the largest group, equipped with very important biological activities. Alsidium corallinum (A. corallinum) is widespread in the Mediterranean Sea, Madeira and the Canary
Islands and identified by Agardh [9]. These algae have insecticidal effects due to its rich composition in domoic acid.
Although red algae A. corallinum is used for a long time in
therapy as antiviral and antibacterial [10], research on its
development, composition, and antioxidant activities remains
scarce.