Female bodybuilding pictures
A more lipophilic drug (one with a high partition coefficient) would distribute much moreso into a more lipophilic target organ than into a less lipophilic one. female bodybuilding pictures Side-effects-of-steroid-use. It may then be the case that the longer chain esters partition more preferentially into muscle and less preferentially into the skin and prostate, but this is not demonstrated. For this to be the case, it would be necessary for the esterified steroids to be distributed throughout the body after slow release from the oil depot injection site, rather than to have only free parent drug released from the injection site. This is an agreement with the findings of James et al. female bodybuilding pictures Muscle system. 3 which demonstrate that the esters do indeed become distributed throughout the body after injection. I don't, however, expect that differences in distribution are the primary reason for observed differences in anabolic/androgenic ratio between different steroid esters. There is another possible explanation for differences in this ratio. female bodybuilding pictures Steroid-deca-durabolin. In the same work referenced above concerning anabolic effect as a function of pharmacokinetics, van der Vies showed that if nandrolone is administrated with frequent dosage patterns designed to give the same trend of serum levels as seen with either phenylpropionate or decanoate, nandrolone itself gave the same anabolic/androgenic ratios as each of these esters of nandrolone. What application does this information on anabolic/androgenic ratio have to female bodybuilding?Since keeping androgen levels constant and moderate gives a higher anabolic/androgenic ratio than using the same total amount of drug per week but allowing levels to spike and then subside, female bodybuilders are better advised to use either long acting esters, or if short acting esters are used, to inject small doses frequently (twice per half-life). And for the same reason, a given amount of oral steroids per day is better taken in divided doses than in a single larger dose. This is probably because tissues with sex-specific traits exhibit thresholds to effect of androgens. Below the threshold, nothing happens, but above it, cellular differentiation occurs. Thus, while female levels of androgens are about 10% that of a male's, 10 years of female levels of androgen will not grow as much beard or change the voice as much as one month of male levels. The threshold simply is not crossed at the lower levels, but is crossed at the higher levels. Female bodybuilders will do better to avoid spikes in androgen level that cross this threshold. Therefore, consistent low doses are better than spiking with intermittent high doses, and advice to use 100 mg/week of testosterone propionate to avoid virilization simply makes no sense (and in practice, often fails. )It should still be noted that some women will suffer virilization with almost any dose of anabolic steroid, regardless of dosing pattern. What are the half-lives of different esters?Shorter chain esters have shorter half-lives, because of their lower partition coefficient. Testosterone cypionate has a half-life of 8 days5, the enanthate ester has a half-life of 4 days6, and nandrolone decanoate has a half-life of 8 days7. These figures are only approximate. The difference between these values for cypionate and enanthate probably includes difference attributable to different measuring techniques. The actual difference is probably not more than two days. In the rat, where half-lives of anabolic steroid esters are similar to those in humans but somewhat shorter, the half-lives of the phenylpropionate, decanoate, and laurate esters are 1, 5, and 10 days respectively. 3 The same trend would be expected in man. Half-life is linearly related to log partition coefficient, which is itself linearly related to the carbon chain length, the exception being if the ester is an unusual one such as phenylpropionate. This was shown by James et al. 3 for the formate through valerate esters of testosterone in the rat. The half-life of testosterone propionate was approximately 4 days, and each carbon added to or subtracted from that chain length changed half-life by about 1. 5 days. How are steroid esters made, and can esters be made of prohormones?The most convenient method of synthesis of steroid esters is reaction of the steroid in a 2:1 mixture of pyridine and the anhydride of the desired ester: for example, propionic anhydride would be used to make the propionate ester. A large excess (at least 10 times) of the anhydride compared to the steroid would be required.
Female bodybuilding pictures
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