More Potent and More for your Money
I could tell a difference immediately compared to the 0.5 % NAC I had been using. I actually felt less sting from these drops than the less potent. I also like the fact that they are cheaper as well as more potent. You get much more for your money. As for stinging...it's normal. If it didn't sting it wouldn't be working. I'm glad I found this item.
Rating: 5 stars