Collagen is the most abundant protein in the human body, being the essential constituent of cartilage, tendons, bones (90%) and skin (70%). Proteins contribute to the maintenance of bones in conditions normal, and to preserve and increase muscle mass. Magnesium helps reduce tiredness and fatigue and contributes to the synthesis of normal protein and bone maintenance under normal conditions. Vitamin C improves the absorption of iron and contributes to the normal formation of collagen for the normal functioning of blood vessels, bones and cartilages.