Alpha Hydroxy Face Lotion What Is The Difference Between Alpha Hydroxy And Beta Hydroxy In A Face Lotion ?

What is the difference between Alpha Hydroxy and Beta Hydroxy in a face lotion ? - alpha hydroxy face lotion

I use lotion on my life, the face of Neutrogena and Oil of Olay anti-wrinkle night cream. Suggestions or advice? I have combination skin (T) zone.