Retinol delivers more proven skin benefits than almost any other over-the-counter ingredient. It speeds up cell turnover, builds new collagen, fades dark marks, clears acne,...

Both SAP and L-ascorbic acid are forms of Vitamin C. Both fade dark spots, brighten skin, and block free radicals. The difference is in stability...

Glycolic acid works best at night. While you sleep, skin repairs and cell turnover is faster - this is when an AHA serum can do...

Oily skin needs three things: oil control inside the pore, barrier support on the surface, and SPF every morning. Salicylic acid handles the first job....

Most skin doctors say your mid-20s is the right time to start retinol. That is when collagen begins to break down slowly and dark spots...

Vitamin C fades dark spots, but it does not erase them overnight. It works by blocking the enzyme your skin uses to make melanin. Less...

Glycolic acid side effects happen when it is overused, used at too high a strength, or paired with the wrong actives. The most common ones...

Wet your face with lukewarm water. Apply 2 to 3 pumps of Salicylic Acid 2% Face Wash to your palm. Work it into a lather...

A dermatologist's step-by-step routine for combining glycolic acid and niacinamide for smoother, more even skin.

A dermatologist's guide to the common and rare side effects of salicylic acid, and how to avoid them.