Popular AHAs are glycolic, lactic, and mandelic acid. Salicylic acid is the most common BHA. And finally, common PHAs are gluconolactone, galactose, and lactobionic acid. On the other hand ...

Few beauty treatments are as tried-and-true as facials, and given that efficacy, it's hardly surprising there are countless variations. From your standard at-home spa day to in-office microneedling ...