Testosterone body

Current practice states that men with prostate cancer should not receive testosterone as it is thought to accelerate an active case. Note that testosterone is not thought to cause prostate cancer, but may speed up the severity of the disease. Men who are, or have been treated for prostate cancer are at risk for the fatigue and decreased libido of low testosterone as well. Since hormone replacement is typically not recommended for this group, other options are needed. A special combination of two forms of the nutritional supplement carnitine has shown equal effectiveness in battling fatigue and maintaining well being [Source: Cavallini ]. This combination contains 2,000 mg of acetyl L-carnitine and 2,000 mg of propionyl L-carnitine.   The heart benefits that are seen with testosterone replacement have not been studied with this combination.

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Rest Harder Than You Work Out

If you overtrain -- meaning you don't allow your body to recuperate adequately between training sessions -- your circulating testosterone levels can plunge by as much as 40 percent, according to a study at the University of North Carolina. The symptoms of overtraining are hard to miss: irritability, insomnia, muscle shrinkage, joining the Reform Party. To avoid overtraining, make sure you sleep a full eight hours at night, and never stress the same muscles with weight-lifting movements two days in a row.

The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression". [77] [78] Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible. [77] The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game. [79] Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males. [80] [81] [82] [83] [84]

Testosterone is the principal male sex hormone, and is required for sperm production, development of male reproductive organs and appearance of secondary male sexual characteristics. SHBG is a transporter protein that binds to sex hormones such as testosterone in the bloodstream. Only a small fraction of circulating testosterone is free (and therefore biologically active), as the majority is bound to SHBG and therefore inactive. When measuring testosterone concentrations in the blood, ‘free’ testosterone is calculated from total testosterone and SHBG levels.

What researchers have found is that individual hair follicles have different expression of genes within the follicle. Each gene expression reacts differently to androgen. Some genes inhibit follicle health and some increase follicle health. Since each follicle is independent of one another, each gene expression is also independent of one another. This is why hair transplants work. The follicles on your head might be dying, but the ones in other areas of your body are not, so doctors can simply move them. The transplanted hair follicle will not die because the genes associated with that follicle are not negatively affected by androgen, no matter what area of the body they’re in.  Nothing like back hair on your head!  The process that allows a specific gene to be expressed in a certain follicle isn’t yet understood. What is known is that the programming occurs in the pattern processing during development.

Testosterone body

testosterone body

The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression". [77] [78] Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible. [77] The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game. [79] Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males. [80] [81] [82] [83] [84]

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