Back in the 90's DHEA was the " miracle supplement".....it could cure heart attacks, hemorrhoids and hurricanes.
Now.....not so much.
I tried it...it did nothing for me except make my wallet a little thinner.
From a cycling perspective you should avoid it. Dehydroepiandrosterone (DHEA) is legal to purchase in the US but it isn't an allowed substance to use when cycle racing or in most other sports. If you're ever drug tested then it's easily detectable and you will get banned. There are several high profile examples of this happening. It can also be included in other supplements causing a failed drug test.
If you ever have to take an employment related drug test for your work then taking DHEA could give a positive result there also with potentially serious consequences.
DHEA is a naturally occurring steroid hormone in the body. Although DHEA is classed as a steroid the main effect is to increase estrogen levels, rather than testosterone levels, so it isn't much of a performance booster. It can help with recovery mostly and maybe weight loss. As you age the levels of naturally produced DHEA fall which is where it may be beneficial as an anti ageing supplement for older people.
I in Andy Pruitt's book that balancing DHEA with DIM (I am not even going to try to spell it) was great for recovery. The key was that the DIM balanced out the estrogen and allowed the DHEA to do it's thing?