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Testosterone hormone!
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Testosterone is a steroid hormone from the androgen group. Testosterone is primarily secreted in the testes of males and the ovaries of females although small amounts are secreted by the adrenal glands. It is the principal male sex hormone and an anabolic steroid. In both males and females, it plays key roles in health and well-being. Examples include enhanced libido, energy, immune function, and protection against osteoporosis. On average, the adult male body produces about twenty times the amount of testosterone than an adult female's body does[1].
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Effects of testosterone on humans
In general, androgens promote protein synthesis and growth of those tissues with androgen receptors. Testosterone effects can be classified as virilizing and anabolic effects, although the distinction is somewhat artificial, as many of the effects can be considered both. Anabolic effects include growth of muscle mass and strength, increased bone density and strength, and stimulation of linear growth and bone maturation. Virilizing effects include maturation of the sex organs, particularly the penis and the formation of the scrotum in fetuses, and after birth (usually at puberty) a deepening of the voice, growth of the beard and axillary hair. Many of these fall into the category of male secondary sex characteristics.
Testosterone effects can also be classified by the age of usual occurrence. For postnatal effects in both males and females, these are mostly dependent on the levels and duration of circulating free testosterone.
Most of the prenatal androgen effects occur between 7 and 12 weeks of gestation.
Genital virilization (midline fusion, phallic urethra, scrotal thinning and rugation, phallic enlargement)
Development of prostate and seminal vesicles
Early infancy androgen effects are the least understood. In the first weeks of life for male infants, testosterone levels rise. The levels remain in a pubertal range for a few months, but usually reach the barely detectable levels of childhood by 4-6 months of age. The function of this rise in humans is unknown. It has been speculated that "brain masculinization" is occurring since no significant changes have been identified in other parts of the body.
Early postnatal effects are the first visible effects of rising androgen levels in childhood, and occur in both boys and girls in puberty.
Adult-type body odour
Increased oiliness of skin and hair, acne
Pubarche (appearance of pubic hair)
Axillary hair
Growth spurt, accelerated bone maturation
Fine upper lip and sideburn hair
Advanced postnatal effects begin to occur when androgen has been higher than normal adult female levels for months or years. In males these are normal late pubertal effects, and only occur in women after prolonged periods of excessive levels of free testosterone in the blood.
Phallic enlargement (including clitoromegaly)
Increased libido and erection frequency
Pubic hair extends to thighs and up toward umbilicus
Facial hair (sideburns, beard, moustache)
Chest hair, periareolar hair, perianal hair
Subcutaneous fat in face decreases
Increased muscle strength and mass
Deepening of voice
Growth of the adam's apple
Growth of spermatogenic tissue in testes, male fertility
Growth of jaw, brow, chin, nose, and remodeling of facial bone contours
Shoulders widen and rib cage expands
Completion of bone maturation and termination of growth. This occurs indirectly via estradiol metabolites and hence more gradually in men than women.
Adult testosterone effects are more clearly demonstrable in males than in females, but are likely important to both sexes. Some of these effects may decline as testosterone levels decline in the later decades of adult life.
Maintenance of muscle mass and strength
Maintenance of bone density and strength
Libido and erection frequency
Mental and physical energy
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Therapeutic use of testosterone
Testosterone was first isolated from a bull in 1935. There have been many pharmaceutical forms over the years. Forms of testosterone for human administration currently available in North America include injectable (such as testosterone cypionate or testosterone enanthate in oil), oral Andriol, buccal Striant, transdermal skin patches, and transdermal creams or gels Androgel and Testim. In the pipeline are a "roll on" delivery method and a nasal spray.
The original and primary use of testosterone is for the treatment of males who have too little or no natural endogenous testosterone production; males with hypogonadism. Appropriate use for this purpose is legitimate hormone replacement therapy, which maintains serum testosterone levels in the normal range.
However, over the years, as with every hormone, testosterone or other anabolic steroids has also been given for many other conditions and purposes besides replacement, with variable success but higher rates of side effects or problems. Examples include infertility, lack of libido or erectile dysfunction, osteoporosis, penile enlargement, height growth, bone marrow stimulation and reversal of anemia, and even appetite stimulation. By the late 1940s testosterone was being touted as an anti-aging wonder drug (e.g., see Paul de Kruif's The Male Hormone).
To take advantage of its virilizing effects, testosterone is often administered to transmen (female-to-male transsexual and transgender people) as part of the hormone replacement therapy, with a "target level" of the normal male testosterone level. And like-wise, transwomen are sometimes prescribed drugs [anti-androgens] to decrease the level of testosterone in the body and allow for the effects of estrogen to develop.
There is a myth that exogenous testosterone can more or less definitively be used for male birth control. However, the vast majority of physicians will agree that to prescribe exogenous testosterone for this purpose is inappropriate. But perhaps more importantly, many men of first hand found this myth to be untrue or at least, unreliable. This is especially true when exogenous testosterone is used in conjunction with hCG.[citation needed]
Exogenous testosterone supplementation comes with a number of health risks. Fluoxymesterone and methyltestosterone are synthetic derivatives of testosterone. In 2006 it was reported that women taking Estratest, a combination pill including estrogen and methyltestosterone, were at considerably heightened risk of breast cancer.
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2006-10-26 23:32:25
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answer #1
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answered by Anonymous
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rogain for the face?
dude don't w-a-n-k. don't have sex, don't discharge, the more proteins that stay in your body and hormones etc. the more growth you will have.
don't shave
eat lots of food containing protiens
and get lots of testostorone or take supliments.. the catch is.. you may get hair other places too.
oh there are other things like dhea and other hormone systems, just ask the bearded women.
young facial hair is pretty "uhm light and sparse" imo.. in most cases.. not always.. more info to come maybe
2006-10-27 00:01:47
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answer #3
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answered by intracircumcordei 4
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Some girls like it, some dont. Magazines are in ur favor, cuz they depict all men with no body hair (as if) ANYWAY... man, its a lot to deal with. Throw on some cologne and build muscle... Thats masculinity...
2016-03-19 00:30:30
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answer #4
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answered by Anonymous
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