Have you ever noticed that when dust accumulates in your furniture, it dulls the surface? Not so noticeable, not dull none the less. Your skin is the same way. You can clean it and moisturize it, but it still looks dull. That is where AHA and BHA come in. Hard-working acids to give you back the glow of youth and stop that pesky acne in its tracks.
What is AHA?:
AHAs are derived from sugars. The ever-popular glycolic acid comes from sugar cane and pineapple. Lactic acid is an offspring of fermented dairy like yogurt—legend has it, Cleopatra owed her youthful beauty to sour milk baths. Other, milder AHAs include citric acid from citrus fruits, malic acid from apples and blueberries, mandelic acid from almonds, and tartaric acid from grapes and tamarinds. Because these acids come from fruit, it also passes down its antioxidant properties to deal with pollution that can rob skin of its glow. What’s more, your skin is likely to be less oily within days of starting the AHA.
The primary job of AHA is to help with skin peeling. (don’t worry, not the post-sunburn kind of peeling.) “AHAs stimulate new cell generation, resulting in improved skin texture and a brighter complexion,” says Ellen Marmur, MD, a board-certified dermatologist in New York City and founder of MMSkincare.
Products with AHA aim to minimize age spots and discoloration from UV damage. Studies show that pairing products with glycolic or lactic acid along with sunscreen reduces fine lines around your eyes better than relying on sunscreen alone.
“I recommend that everyone consider incorporating at least one AHA product into their weekly regimen starting at the age of 20 as both a preventative and a corrective,” says Loretta Ciraldo, MD, a board-certified dermatologist in Miami and founder of Dr. Loretta Skincare.
What are BHAs?
You may not realize it, but you probably already have a BHA product in your bathroom cabinet—it’s salicylic acid. This willow bark compound has been used as a skin remedy for more than 2,000 years; although now it’s also produced synthetically. Salicylic acid’s gentler cousin, betaine salicylate, stars in mask, and cream formulas.
Your pores are kind of like a landfill, and salicylic acid is a micro excavator that penetrates deep to eliminate skin trash like sebum and dead skin cells. That’s why you want to upgrade from spot treatment to full-face treatments.
While BHAs show visible improvement in pores and acne in as little as two weeks, about 5 percent of people get a purging—an annoying uptick in pimples as the pores empty out before skin actually clears, says Ciraldo.
BHAs are more than a pimple foe, however. Like AHA, it has peeling properties, just gentler. This makes BHAs a great option for sensitive skin that needs to treat sun pigmentation or blotchy melasma. Remember that skin will improve and lighten, just not as quickly as a treatment with glycolic acid.
How do you add AHAs and BHAs to your skincare routine?
These hydroxy acids work, it depends on how sensitive your skin is. “All exfoliating products should be integrated into the skincare routine slowly, starting just three times per week and increasing weekly as tolerated,” recommends Elyse Love, MD, a board-certified dermatologist in New York City. “Those with sensitive skin will need to take it even slower. Toners are an easy way to add acids to a skincare routine without altering other components of the routine.”
Creams with AHAs and BHAs are the least irritating of all the options. For dry skin, try a lactic acid cleanser to soften and moisturize skin. But if you’re looking for higher concentrations of acids, opt for a mask because they are not meant to be used daily, adds Love.
If your skin is usually friendly with new ingredients, look for something with glycolic acid at the top of the ingredient list. Glycolic acid has the smallest molecule of all the AHAs, so it penetrates deep into the skin and is most effective at banishing sun spots and fine lines, especially on the cheeks.
To target congested pores and inflammation, use BHAs on the T-zone and the skin around the mouth.
You should also consider using AHAs and BHAs separately in shifts, say a cleaner with AHA in the morning, and a BHA toner at night. Instead, consider expertly formulated products that add just the right amount of AHAs and BHAs to keep your skin from flaring up. Glycolic and mandelic acids and nourishing plant oils, so you can mask away without worry.
However, if you decide to incorporate AHAs and BHAs into your beauty routine, follow the Golden Rule of Acids—thou shalt wear sunscreen daily. Not only do you need sunscreen to make sure you’re not undoing your path to dewy skin, but AHAs and BHAs also cause skin sensitivity to UV light, making you more susceptible to sunburn even 24 hours after application.
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