Why we need collagen? role of collagen in our body collagen is found within the body in the skin, bones and connective tissue, gives the skin its strength and structure, firmness and renewal of skin cells why need to fortify collagen? collagen production naturally declines when we age, start to decline around the age of 40, with a dramatic reduction in women after menopause. by the age of 60 there is a considerable decline in collagen production. aging reducing the structural integrity of the skin and leading to sagging skin, the formation of lines and wrinkles, hair gets lifeless and the weakening of cartilage in joint, causing pain. exposures to sunlight, smoking and high sugar consumption damage the production of collagen.