Formulated using hydrolysed pure marine collagen (Type II), Natures Aid Collagen Joint Formula combines a number of carefully selected nutrients ideal for those with an active lifestyle or for extra support later in life. Vitamin D3 and Zinc to help maintain normal bones Copper to help in the maintenance of normal connective tissue Manganese to help support the normal formation of connective tissue. Vitamin C to help in normal collagen formation for the normal function of cartilage