Description Elevate your skincare with the skinbetter science Alto Advanced Defense + Repair Serum — a breakthrough antioxidant serum engineered to defend skin against environmental aggressors while actively repairing visible signs of aging. Powered by skinbetter science's exclusive InterFuse® technology, this luxurious serum delivers a potent blend of antioxidants deep into the skin for unmatched protection and visible rejuvenation. Skin looks firmer, brighter, and more youthful with every use. Ingredients Key actives include: Vitamin C (Ascorbic Acid) (brightening, antioxidant defense), Vitamin E (Tocopherol) (skin-nourishing antioxidant), Ferulic Acid (enhances antioxidant efficacy), Peptide Complex (firming and repair support), Hyaluronic Acid (deep hydration), and InterFuse® Delivery Technology — ensuring actives penetrate where they're needed most. How to Use Apply a few drops to clean, dry face and neck each morning and/or evening. Gently press into skin using fingertips until fully absorbed. Follow with moisturizer and broad-spectrum SPF in the AM. Can be layered with other skinbetter science products for enhanced results. For best results, use consistently as part of your daily skincare routine. Why We Love It Advanced antioxidant defense — shields skin from UV, pollution, and free radical damage. InterFuse® technology — delivers actives deeper for superior, visible results. Brightening & firming — visibly reduces dark spots, fine lines, and loss of elasticity. Lightweight & fast-absorbing — silky texture that layers beautifully under moisturizer. Repair + protect — works around the clock to reverse and prevent environmental skin damage.