Hmmmm interesting. Funny you mention it because I was taking gaba not too long ago and it was in a mixture with some other stuff. Anyways, I think it was causing me to wake up kind of uncoordinated and feeling just kind of weird. Dissociative I guess you could say, which makes sense because it’s related to the NMDA receptors somehow I think. It supposedly “can’t” cross the blood brain barrier, at least this is repeated despite the fact that it can and does, it’s just an unreliable mechanism in which it does. Low levels of gaba were insinuated to absorb more in the brain also. I didn’t have this issue as if I took the full 750 mg I felt very strange consistently and none of the other supplements in the mixture would seem to do this.
It is known that diet interacts with androgen levels (known to be related to reduced androgen concentrations in vegetarians  and reduced androgen levels in cohorts with lower fat intakes  ), which is thought to be related to dietary fat since putting men on a low-fat (high fiber) diet reduces circulating androgens  whereas the opposite exists as well (higher fat diet at 41% of calories, with a higher intake of saturated fat, increasing testosterone).  The magnitude of these changes is a low fat diet reducing testosterone in older men by 12%  and an increase in dietary fat in young men increasing testosterone by 13%. 
There are several benefits of higher than average testosterone levels in men. For one, it works well in normalizing blood pressure, while lowering the possibility of heart attacks and obesity. On the other hand, there are also disadvantages that you can expect. There are even signs of high testosterone that you need to watch out. For one, men become more likely to be injured. We also tend to be more exposed to different vices, such as smoking and drinking alcohol. At the same time, according to studies, higher testosterone level may cause men to engage in high risk behaviors, such as injury and sexual risks, as well as criminal activities.