skinbetter science Alto Advanced Defense and Repair Serum is a powerful antioxidant serum designed to enhance the appearance of uneven skin tone, texture, and overall skin clarity. Formulated with an advanced blend of antioxidants, it helps protect the skin from environmental stressors while promoting skin repair. Additionally, this serum helps improve the appearance of skin dullness, redness, and overall tone, leaving the skin brighter, more radiant, and youthful-looking. Ideal for daily use, it is an essential step in any skincare routine.