Re: 4\'s & Affirm no lye
Supposedly, from what I understand:
Lye: can be harsh for the scalp, but better for the hair
No-Lye: better for the scalp, but can be harsh for the hair
I think it depends what your hair and scalp prefer. I've used Affirm Fiberguard NO-LYE before and I had scalp irritation along with shedding. I currently use Affirm Lye Mild, with no problems. It depends on what works best for you and your hair.