I'm in my 40's...
A natural decline in testosterone levels begins at age 30, so I decided to have my levels checked (out of curiosity) to establish a baseline now.

426 & 437 were the results, 3 months apart.

I feel fine, however not like the superhuman animal when 23:

Why not feel incredible again?
Then I had the idea for this anecdotal self-study, to report on Steemit, for the potential benefit for men in their 40's!
My levels were 'within normal limits;' let's see if diet, over-the-counter supplements, and weight training has a measurable effect on hormones?

We'll all find out in June! 🙂