This has been an important addition in my life when I was in early 60's, an integrative MD tested my levels and they were very low. So he got me on otc 25mg DHEA and I've been taking it for over 20 yrs. Pretty life enhancing, I believe. Our levels started to decline at 20-30 yrs of age and the decline begins.
Here is a link on Life Extension and there are many scientific studies from other sources.
https://www.lifeextension.com/magazine/2006/11/report_dhea
I don't know if allopathic MD's do this test as I don't see allopathic docs.
An FYI, do your research, I'm sure glad I found it in my life. One major thing is increased libido, not that this is important to me anymore.
Interesting, at least they admit, it's not for everyone.
"DHEA is not for everyone—people with hormone-dependent cancers such as breast, uterine, and prostate cancers should avoid its use. However, an abundance of new studies suggests that ensuring optimal levels of this vital "prohormone" can help aging adults guard against endothelial dysfunction, vascular disease, metabolic syndrome, bone loss, and other debilitating conditions once thought to be the "inevitable" consequences of aging."