Hyaluronic acid: A powerful humectant (moisture-binding ingredient) that keeps skin plump and hydrated. Retinol: Vitamin A derivative that functions as an antioxidant to prevent free radical damage that leads to wrinkles and other signs of visible aging. Promotes collagen and elastin building. Helps fade discolorations and reduce pores that have enlarged from sun damage. Helps improve acne and pores that have enlarged due to clogging. Resveratrol: An antioxidant found in foods such as grapes, red wine, nuts and fruit that helps protect against sun damage and promote collagen building. Caffeine: Helps combat free radicals, regulate sebaceous gland secretions and reduce redness.