Peter Attia· MD
phenibut is a form of gaba and it was over the counter available freely until about two years ago that easily accesses the central nervous system and i think anybody who's tried phenibut would tell you that this thing is an amazing sleep drug amazing sleep supplement and it seemed to be one that could be used frequently without any concern unlike melatonin for example where you really have to be limited in how much melatonin you're using and how often