Interestingly increased Testosterone DOES improve mental clarity and acuity IF one is already impaired in the first place.
The other stimulus that can increase testosterone production - at least in the short term, its the bodies way of getting you out of the s##t - is fasting ie not getting calories in the first place which can increase a GH and Testosterone spike - how long one can rely on this spike I don't know , I'd imagine its the bodies very clever way of 'robbing peter to pay paul' when the chips are down and you need the body to perform.
If one suffers with low testosterone levels the following mental / emotional symptoms are common:-
- irritability.
- anxiety.
- sadness.
- low sex drive.
- memory problems.
- trouble concentrating.
- sleep problems.
But as mentioned they tend to be far longer term and would be in situa before a survival situation was the salient concern.
The above is why so many men with Low T often get wrongly misdiagnosed with sever depression and placed on happy pills.
Huge travesty.