Collagen is the protein component of the human body that provides structural support and helps strengthen the connective tissues, including bones, tissues, muscles, and skin. This component is naturally produced by the body; it is the reason your skin is supple, smooth, silky, and soft. However, as you age, collagen production reduces, causing sagging and wrinkled skin, weakened muscles, stiff joints, less flexibility, thinning of the gastrointestinal tract, and many other problems.