Collagen Retinol Treatment Serum is a highly concentrated serum that helps improve skin texture. Infused with Collagen to helm maintain elasticity while Retinol fights signs of aging. This perfect blend will leave your skin looking healthy with a radiant glow. How to use: Apply after cleansing 1-3 drops onto palms, and press on face alone. Then moisturize with SPF. Use daily day or night.