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| | Insulin-like Growth Factor-1 |
 | | IGF1 belongs in the ‘superfamily’ of substances known as ‘growth factors,’ along with epidermal, transforming, platelet derived, fibroblast, nerve, and ciliary neurotrophic growth factors. |
 | | Many of the growth promoting effects of GH are due to its ability to release IGF1 from the liver, which in turn acts on several different tissues to enhance growth. |
 | | Circulating IGF1 levels have no relationship to prostate cancer and are not a risk factor in patients, with or without rhGH administration. |
| drcranton.com /hrt/insulinlike_growth_factor1.htm (731 words) |
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