I've ordered Liftmode's Phenibut HCl (Fine Crystals a few times in the past. Their product is usually great. I haven't taken Phenibut for over half a year before placing my last order in November 2022. I felt like the product I received wasn't the same in regards to purity. In other words, it felt like it was less pure than what I used to get. I don't think it's due to tolerance as I haven't consumed Phenibut in 6+ months. Cannot confirm this though as I'm just speculating. All in all, I highly recommend Liftmode for phenibut!