Salicylic acid is a beta hydroxy acid (BHA) that penetrates deeply into pores, helping to unclog pores and remove sebum that can lead to breakouts. A good choice for treating blackheads and whiteheads, salicylic acid can be found in face washes, toners, spot treatments, moisturizers and more. Salicylic acid should be used no more than twice a day.
Hyaluronic acid is neither a BHA or AHA. Instead, hyaluronic acid is a naturally produced substance that helps lubricate and hydrate skin, joints and eyes. Hyaluronic acid helps bind water to collagen, trapping water in the skin. This makes skin plumper and more full-looking. As we age, our bodies naturally produce less hyaluronic acid, making skin drier and more brittle over time., leading to wrinkles and fine lines. Hyaluronic acid doesn’t irritate skin and is most beneficial for those with dry and/or aging skin. You can find it in cleansers, serums, moisturizers and more.
Like hyaluronic acid, azelaic acid isn’t a BHA or AHA. It’s actually a dicarboxylic acid, doing the work of both an AHA and BHA, working at the surface of your skin and also penetrating deeply. For best effect, use azelaic acid at night to even out skin tone and reduce redness, rosacea and melanoma. Azelaic acid is ideal for people with sensitive skin and those who are pregnant.