Retin-A (tretinoin) is a form of vitamin A that helps the skin renew itself. Retin-A improves skin texture and fades dark spots and freckles because it causes skin cells to turn over more rapidly. It shrinks dilated pores and improves cell turnover within the pores, reducing acne.
Retin-A’s greatest claim to fame is it’s ability to increase collagen production at the cellular level. Collagen increases the structure of skin by enhancing firmness and elasticity. Retin-A is FDA approved.