Clinicians Rejuvenate contains marine collagen to help replace declining collagen levels as we age. Collagen is important for strong hair and nails. In the skin, collagen strengthens and supports the upper layers to help prevent lines and wrinkles. Hyaluronic acid attracts moisture to the skin keeping it plump and fresh. Astaxanthin is a powerful antioxidant proven to enhance skin appearance by reducing the appearance of wrinkles and helps improve skin elasticity.