The Watermelon-flavored Marine Collagen with Magnesium and Vitamin C by Ana María Lajusticia is a dietary supplement designed to help strengthen bones, muscles, and the immune system. Collagen is the most abundant protein in the human body, essential for the health of cartilage, tendons, bones, and skin. Each serving contributes to normal bone maintenance and helps preserve and increase muscle mass. Magnesium helps reduce tiredness and fatigue. Vitamin C improves iron absorption and supports collagen formation.