What are AHAs, PHAs, and BHAs?

AHA, PHA,& BHA this can sound like some crazy scientific jargon. But AHA, PHA, and BHA are all acids that work to brighten your complexion. I know what your thinking, I don’t want to put acid on my skin and melt my face off. Don’t worry these acids work as mild exfoliates to reduce acne, fade dark spots and brighten your skin. But what exactly do these acronyms mean and which should you be using?