> I'm having this problem, but I've put it down to having small children, the chronic lack of sleep and the rarely having more than 1 hour time in a week where it's quiet and I can focus.

Evidence of testosterone supplementation improving cognitive performance is weak despite many studies.

Evidence of sleep associated with cognitive performance is extensive and well documented.

The (not that helpful in the moment) good news is that kids get older and will eventually sleep more and more independently.

Indeed, there is a light at the end of the tunnel. With young kids, problems that need an immediate solution are frequent. (When the toilet overflows, you can't just leave it for later.) Now that my kids are a bit older, the problems are more complex, but we generally have more time to work on them. (Kid needs to be convinced to clean their room so they can find their wallet.)

I would recommend trying to work on diet/exercise before I would go down the TRT path. If you get those squared away and stress at home is reduced and you still are having the same issues then it maybe something to look into.

That's the plan - I was lifting before we had our youngest (2.5) and fairly fit (dad bod but I was working on it). Last 2.5 years ruined that. Will be happy when I can get back to regular training but for that to happen we need to be over this current period.

And quality sleep.