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Porphyrans are exclusively derived from Porphyra species belonging to genus Rhodophyta. Porphyran is a sulfated polysaccharide consisting of D‐galactose, 3,6‐anhydro‐L‐galactose, 6‐O‐methyl‐D‐galactose, and L‐galactose 6‐sulfate units [151]. Porphyran demonstrates high solubility in an aqueous solvent and safe for the skin when it is formulated in cosmetic products as a solvent in liquid or emulsion form. The bio‐functional activity of porphyrans includes skin whitening, anti‐inflammatory, and moisturizing properties and hence used in topical or systemic skin cleansers, cosmetic wipes, cosmetic cotton, sanitary cotton, wet tissue, skin lotion, skin cream, ointments, gel, face pack, shaving agents, facial cleansing agents, etc. [78, 88, 93, 100].