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Can Growth Hormone Prevent Aging?

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Does growth hormone prevent aging? An article by Rudman et al. that appeared in the Journal in 1990 reported the effect on body composition of administering human growth hormone for six months to 12 older men. This article incited a proliferation of "antiaging" clinics and lay publications, such as "Grow Young with HGH," extolling the benefits of growth hormone in reversing or preventing aging.

There are several web sites that attempt to sell various oral and inhaled formulations of growth hormone; none of these formulations have been shown to be efficacious. In fact, since growth hormone is a peptide subject to degradation by gastric acid, oral preparations would not be expected to be effective. Other Web sites are selling oral formulations (branched chain amino acids) that are claimed to release growth hormone. These oral formulations are based on studies of intravenous arginine. Intravenous arginine increases serum concentrations of growth hormone transiently (for less than one hour). The effect of oral branched chain amino acids is akin to that of eating a steak. Clinical medicine is practiced on the basis of established evidence regarding outcomes. What is the evidence supporting the use of growth hormone to prevent aging?

First, it is necessary to recall exactly what the study by Rudman et al. demonstrated. Twelve healthy men, 61 to 81 years of age, who had serum concentrations of insulin-like growth factor 1 below those found in normal young men received growth hormone for six months. (Insulin-like growth factor 1 mediates the action of growth hormone, and its concentration reflects the circulating concentration of growth hormone.) The weekly dose of growth hormone was approximately twice as high as the dose used in adult men with a growth hormone deficiency.

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HGH Publications

References:
The New England Journal of Medicine
1990
http://content.nejm.org/cgi/content/full/348/9/779

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