Steroids molecular structure

Testosterone can be administered parenterally , but it has more irregular prolonged absorption time and greater activity in muscle in enanthate , undecanoate , or cypionate ester form. These derivatives are hydrolyzed to release free testosterone at the site of injection; absorption rate (and thus injection schedule) varies among different esters, but medical injections are normally done anywhere between semi-weekly to once every 12 weeks. A more frequent schedule may be desirable in order to maintain a more constant level of hormone in the system. [56] Injectable steroids are typically administered into the muscle, not into the vein, to avoid sudden changes in the amount of the drug in the bloodstream. In addition, because estered testosterone is dissolved in oil, intravenous injection has the potential to cause a dangerous embolism (clot) in the bloodstream.

[ Editor's Note: Chryste Gaines, MBA, Olympic gold and bronze medal sprinter and former teammate of Marion Jones in the 2000 Sydney Olympic Games, stated the following in a Dec. 22, 2008 email to in response to the IOC ruling:

"We are being unfairly punished. If the drug testing agencies cannot determine if an athlete is taking performance enhancing drugs how are the teammates supposed to know?... It negates all the family functions, church functions, and social events we missed in the name of winning an Olympic medal." ]

Finally, specific advice. If you are looking to juice for the first time, don’t get too complicated! I hear of people going out the first time and running 5 different drugs.. That’s crazy; there’s simply no need to do that, you can only grow so fast and there’s not much gained (except risk) by going poly drug. A great 8-12 week cycle for most men is 500mgs/wk of testosterone and .5 to 1mg 3X a week of Arimidex (depending on how you feel). That’s it. No need to over complicate things! Also, you need to get over any fear of needles. Oral steroids are ALL DANGEROUS because they need to go through your liver, and, because of that, they all stress your body a lot more than injections. It’s not that bad, I’ve been doing it 2X a week for years, you get used to it. Not the highlight of my day, but no worse than a lot of other things! If you just want to be sterile, 250mgs/wk of testosterone with .5 Arimidex 3X a week will do it for most men. That’s a high TRT dose, and will make most steroid newbies grow pretty well; but it’s low enough that most people can stay on it indefinitely. Oh, and, one other thing.. Get some Rogaine. 😉 That’s a real negative side effect of steroids, if you’re predisposed to male pattern baldness, steroids WILL accelerate the hair loss. Rogaine (or Propecia, if you can stand the sides) helps immensely.

The early steps in the biosynthesis of steroids of both plants and animals are the same, except that in plants lanosterol is replaced by the related compound cycloartenol, which contains a three-membered ring (C9, C10, C19) in lieu of the nuclear double bond of lanosterol. The side chains of the phytosterols, such as stigmasterol, and of the sterol ergosterol of yeasts and other fungi contain extra carbon atoms that are incorporated in reactions involving S -adenosylmethionine, which donates methyl groups in numerous biological processes. Although most plant tissues contain only traces of cholesterol, this sterol is the biogenetic precursor of such important plant steroids as the sapogenins , glycosides , and alkaloids . Because pregnane derivatives are intermediates in some of these transformations, plants and animals appear to have important features of steroid metabolism in common.

Steroids molecular structure

steroids molecular structure

The early steps in the biosynthesis of steroids of both plants and animals are the same, except that in plants lanosterol is replaced by the related compound cycloartenol, which contains a three-membered ring (C9, C10, C19) in lieu of the nuclear double bond of lanosterol. The side chains of the phytosterols, such as stigmasterol, and of the sterol ergosterol of yeasts and other fungi contain extra carbon atoms that are incorporated in reactions involving S -adenosylmethionine, which donates methyl groups in numerous biological processes. Although most plant tissues contain only traces of cholesterol, this sterol is the biogenetic precursor of such important plant steroids as the sapogenins , glycosides , and alkaloids . Because pregnane derivatives are intermediates in some of these transformations, plants and animals appear to have important features of steroid metabolism in common.

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