Mohamed S. Attia 1,*, Mahmoud S. Osman 1,* , Amr S. Mohamed 2 , Hany A. Mahgoub 1, Mohamed O. Garada 3,4 , Eslam S. Abdelmouty 1 and Arafat Abdel Hamed Abdel Latef 1 Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11651, Egypt; h.mahgoub@azhar.edu.eg (H.A.M.); drislam20013@gmail.com (E.S.A.) 2 Biotechnology Lab, Horticulture Research

:Abstract Seaweeds have a growing number of successful applications in the food industry, medicine and in the cosmetic industry, which increases the importance of evaluating their chemical composition. In the present study, three common Egyptian seaweeds (Dictyota dichotoma, Turbinaria decurrens and Laurencia obtusa) were collected from the Red Sea coast, Suez, Egypt. The chemical profile