5.For Dull Skin: AHAs, Retinoids
If you smoke or if your skin is dry, you’re more likely to have dull skin. A moisturizer may make it look fuller and firmer. Alpha hydroxy acids and retinoids (like retinol) could brighten your skin when they remove dead skin cells.
6.Which Strength Do I Need?
Some over-the-counter products only come in one strength. Others have different levels of the active ingredient. If you choose something that might dry or irritate your skin — like retinol — start with the lowest strength and get used to it before you try something stronger.
