Abstract
Dehydroepiandrosterone sulfate (DHEAS) is the most abundant circulating steroid hormone in humans and can readily be converted to its parent steroid DHEA by tissue sulfatases. Yet, a biologic function for these steroids has not been defined. The link between DHEA and aging has been raised by: (1) its well documented age-related decline, and (2) a preventive effect of DHEA on numerous age-related illnesses: ischemic heart-disease, cognitive impairment, immunodeficiency, malignancies, osteoporosis. These effects have been suggested by epidemiological studies in humans. Animal studies support a protective effect of DHEA on these age-related diseases. However, it remains unknown whether these results in animals can be transposed in humans, because adrenal secretion of DHEA seems to be particular to primates. In humans, only a few studies have been performed. The effects of oral supplementation with DHEA have, so far, focused on the possible metabolic effects of DHEA. A few studies have shown: the absence of any side-effects; no change in body-weight; conflicting results on body-composition and lipids and no effect on insulin-tolerance. The latest study showed a beneficial effect on well-being but these results need to be confirmed.
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