As we age, our skin loses moistures and elasticity. In addition, damage caused by UV light accumulates over time causing the skin to age at a faster rate. Retinol serum is one of the most effective anti-aging treatments available today. It is a form of vitamin A that plays an important role in cellular growth and differentiation, cell surface alterations, and immune modulation. It has been studies since World War II and has been used in skincare over 2 decades. It improves photo-aging by modifying cellular differentiation programs mainly initiating the increase of epidermal proliferation leading to epidermal thickening, compaction of the stratum corneum; and biosynthesis and deposition of the glycosaminoglycans important component of cell matrix.