Dehydroepiandrosterone or DHEA is a precursor hormone produced by the adrenal glands. Precursor hormones are the kind that transform into other substance, which in this case is testosterone. DHEA is the most abundant steroid in the body but it begins to decline as we age. That’s why some people need DHEA supplements that have been made in the laboratory. We developed this roundup of DHEA reviews to help you find the right supplement.