Food Supplement based on MSM, Amino Acids, Vitamins and Minerals. Presentation: 90 1600mg tablets. Net quantity: 144g. Instructions for use: Take 1 tablet a day. Nutravit Complex MSM (Methyl Sulfonyl Methane) provides a source of sulfur in its intake and although there is no DRI (Reference Daily Intake), the sulfur deficiency causes our body to not function correctly. It is present in foods such as onions, garlic, legumes, tomatoes, avocados and other vegetables and foods that contain protein, such as nuts, seeds, milk and eggs (whites and yolks). It is also found in the joints, hair, skin and nails. The body uses L-Lysine (essential amino acid) to build muscle tissue and collagen, a fundamental constituent of cartilage, connective tissue and skin. On the other hand, L-Proline (non-essential amino acid) can be manufactured in the body and is involved in collagen production. Vitamin C contributes to the normal formation of collagen for the normal functioning of bones, cartilage and skin. Zinc, for its part, contributes to the maintenance of hair, skin and nails in normal conditions. Copper contributes to the maintenance of connective tissue under normal conditions. Biotin, commonly known, contributes to the maintenance of hair in normal conditions.