DHEA, human growth hormone, and melatonin are all extremely questionable, and are probably ill-advised. Using human growth hormone in human beings bulks them up. But it does not just mean more muscle mass. With it can come hypertrophy of the heart, fluid retention, and other problems. And of course there’s a disease, acromegaly, which is actually characterized by an excess of human growth hormone. DHEA is what’s for years been called the “junk hormone.”