I recently had a neurotransmitter test because I tend to be too hyper. The doctor put me on "targeted amino acid therapy." It turns out that GABA (gama amino butyric acid), one of the things the doctor had me take cured my hot flashes. I use ___ encapsulations brand because of their high quality. I think one capsule is about 675 mg. I take one first thing in the morning on an empty stomach and then again after work (also on an empty stomach). Hot flashes and night sweats are gone! I'm 51 years old and just started getting hot flashes. They were coming about every 30 minutes. I've never found this information anywhere on the web so I thought I'd share my experience.