ok..I appreciate this info greatly, though, I am curious if you may have read about difference between n-acetyl-cysteine and l-cysteine.....or difference between n-acetyl-cysteine and n-acetyl-l-cysteine....I am wanting to get going on taking one, I have now n-acetyl-l-cysteine that I bought just before I found your message. And definetely don't want my facial hair to grow more. Could you please respond because it will nt only help me but possibly many others, thank you much