Alpha-Hydroxy Acids (AHAs)
Beta-Hydroxy Acid (Salicylic Acid)
Many skin care products contain salicylic acid. Some are available over-the-counter and others require a doctor's prescription. Studies have shown that salicylic acid is less irritating than skin care products containing alpha-hydroxy acids but has similar results in improving skin texture and color.
Warning: People who are allergic to salycylates (found in aspirin) should not use products containing salicylic acid. Salicylic acid can be absorbed into the bloodstream and may cause an allergic reaction or contact dermatitis. Pregnant or nursing women should not use products containing salicylic acid.
You may also hear about retinyl palmitate. This is in the same family as retinol, but if the skin care product you choose contains retinyl palmitate, you will need to use more of this product than one that contains retinol to get the same effect. Pregnant women or nursing mothers cannot use retinol.