From the world of plants, taxonomically diverse algae are a very widespread marine raw material. They are a rich source of vitamins, minerals, antioxidants and natural dyes, easily digestible microelements, protein, fatty acids and vitamin B₁₂. They affect the positive lipid profile and they have immunomodulatory, antioxidant and anti-glycemic effect. Several substances from algae are at various stages of research studies that give hope for their use in the treatment of pain and various types of cancer. Despite the popularity of the abovementioned marine raw materials with proven medicinal properties, they have not reached the pharmacopoeia. The current Polish Pharmacopoeia XI contains only monographs of fucus (Fucus vel Ascophyllum) and 40% ointment Olei Iecoris Aselli Unguentum.