Adverse effects of steroid use
1992, Raynaud et al. adverse effects of steroid use Causes obesity children. 1993a, Raynaud et al. 1993b, Dehennin & Matsumoto 1993). In order to decrease the possibility of a false positive test, the IOC is contemplating on using a new method of detection based on a comparison between the carbon isotope ratio (13C/12C) of testosterone metabolites and those of testosterone endogenous precursors (Shackleton et al. adverse effects of steroid use Weight loss surgury. 1997a, Shackleton et al. 1997b). This technique relies on the fact the synthetic testosterone has a different carbon isotopic signature than natural testosterone. adverse effects of steroid use Bodybuilding supplement. A similar approach can be use for determining the use of exogenous nandrolone and the nor-prohormones. As such the use of carbon isotopes in nandrolone metabolites can also be used to differentiate between exogenous and endogenous 19Na and 19Ne making up for various uncertainties about the variations in urinary NA concentrations due to physiological and pathological conditions. As well, ways may be found, because of the differences in metabolite excretion, of differentiating the use of nandrolone as against the nor-prohormones. Another method, that seems to be able to detect the prior use of nandrolone even if urine testing is negative, is hair analysis. The presence of nandrolone in hair could be used to substantiate the exogenous use of nandrolone since endogenous nandrolone levels exist as an intermediate product that is converted in whole to it's metabolites including NA and NE, and as such are too low to be detected in serum, urine or hair. ConclusionsThere are several factors that could impact on nandrolone and nor metabolite formation and excretion resulting in the elevated levels of NA and NE. The limited data that is available falls far short of examining these factors and their effects of steroidogenesis and the subsequent urinary excretion of NA and NE. Since there are few valid published studies examining serum or urinary levels of nandrolone, NA and NE in various physiological and pathological states, and since it has been shown that there is a possibility of increased urinary levels of NA secondary to exercise and/or the use of nutritional supplements that do not contain banned compounds, I feel that in many cases of nandrolone positive drug tests the burden of proof has not been met. As such, we are in a position where the threshold levels in effect today are set up to catch the truly guilty at the expense of also penalizing the innocent. At this point we must ask ourselves, given the career ending impact that a possible drug test has, whether we are willing to sacrifice some innocent athletes to make sure we catch all of the guilty ones. In my mind we are obligated to proving guilt rather than assuming it. We are better to let off some guilty athletes if it means that no innocent athletes are sacrificed to the drug testing cause. As such, it would be both logical and prudent, and a reasonable compromise, to conclude that until we can be close to 100% certain that the nor steroids found in an athlete's urine sample are not endogenous in origin, a drug test showing the presence of less than 100 ng/ cc of NA should be deemed suspicious and warrant follow-up and discussion, and should not automatically be deemed a positive drug test for the use of exogenous nandrolone, or for the use of any exogenous nor steroids. Appendix 1Taken from a recent news release. Richardson cleared of doping charges.
Adverse effects of steroid use
Obesity and pregnancy || Adverse effects of steroid use || Steroids-women || Steroids-women