Gale Encyclopedia, Erika Lenz. Decent article with sufficient depth to understand how andrographis is used in TCM. It's becoming a popular "cold & flu" remedy in the U.S. these days (2005).
"There are very few large, well-designed human studies testing the health effects of DHEA supplements. For example, there is not enough scientific evidence to rate the effectiveness of DHEA supplements in treating adrenal insufficiency, metabolic syndrome, depression, HIV/AIDS, Addison's disease, chronic fatigue syndrome, menopausal symptoms, heart disease, breast cancer, infertility, diabetes, or Parkinson's disease according to the National Institutes of Health (NIH).
In addition, there isn't enough evidence to support the use of DHEA supplements as an anti-aging remedy or weight-loss aid. The NIH also cautions that DHEA supplements appear to be ineffective for boosting libido, enhancing muscle strength in elderly people, protecting against Alzheimer's disease and improving thinking in healthy older people."