ORS has a lye and a no-lye formula. I personally did switch from lye to no lye because i hated the way my hair results were after every touch up with lye. It was always underprocessed and I always had scalp burns. My fragile fine hair couldn't handle the lye. So I went from Silk elements lye to ORS no-lye. I was scurred because it seems themojority chose lye over no lye. But I'm glad I switched because it is the best thing I could have ever done and wished I did it a long time ago. I used Silk Elements based off of all the rave reviews off this board , but all it did was left me dissappointed with burns and underprocessed hair again. That was my last straw on that.