You may have heard of alpha and beta hydroxy acids, but how are they different and which type should you use?
In a nutshell:
- If you have oily, acne-prone skin, look for a beta hydroxy acid such as salicylic acid.
- If you have drier skin and/or are looking to improve fine lines, wrinkles or pigmentation, look for an alpha hydroxy acid such as glycolic or lactic acid.
How do they work?
Both alpha and beta hydroxy acids chemically exfoliate the skin, helping to lift off dead, dull cells from the surface of the skin. They help smooth and brighten skin, even out pigmentation, improve acne, hydrate skin, and reduce fine lines and wrinkles. The most commonly used alpha hydroxy acids are glycolic acid, lactic acid and mandelic acid, whilst salicylic acid is the most commonly used beta hydroxy acid.
What’s the difference between alpha and beta hydroxy acids?
Alpha hydroxy acids are water soluble, so they don’t penetrate as deeply into the skin as the oil soluble beta hydroxy acids. Alpha hydroxy acids are better for dry, ageing skin, while beta hydroxy acids are more suited to oily, acne-prone skin. Alpha hydroxy acids can cause increased sun sensitivity, while beta hydroxy acids can protect from the sun. Beta hydroxy acids tend to be less irritating than alpha hydroxy acids.
