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When men and, for that matter, women think about the powers of testosterone, they are not likely to consider mental processes. Indeed, the male hormone has much more obvious roles in do men go through change of life man's body. Still, new research suggests that testosterone may have a surprising role in masculine mentality. Before you consider how testosterone affects the mind — and before you even begin to think about hormone therapy — you should know how testosterone is produced, how it affects the body, do men go through change of life it changes with age, and how it's measured.

Although testosterone is the most potent male hormone androgenit is only one of. When the ancient Greeks provided the name, they chose well: Androgen local granny that fuck requires a complex chain of events see figure.

It all begins in the brain, where the hypothalamus produces gonadotropin-releasing hormone GnRH, also known as luteinizing hormone—releasing hormone, LHRH. Hormones are chemicals that are produced in one part of the body, then travel to another part where they do their work. GnRH is a true hormone, but it doesn't have a long commute; it acts on a nearby part of the brain, the pituitary gland.

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In turn, the pituitary secretes two additional hormones, follicle-stimulating hormone FSH and luteinizing hormone LH. FSH and LH were named for their effects on women's ovaries, but they are every bit as important for men, since they act on the testicles: LH triggers testosterone production, and FSH, acting with testosterone, stimulates sperm production. Testosterone is produced by the Leydig cells of the testicles. The starting point ho cholesterol, notorious for its effects on the heart but critical for its role as the building block of all sex hormones, both male and female.

After several intermediate steps, cholesterol is converted into androstenedione, the hormone made infamous by Mark McGwire as the unregulated "dietary supplement" andro. Whether androstenedione comes from the body or a bottle, it is rapidly converted into testosterone. Testosterone has many direct effects on the male turough and metabolism. It is responsible for the deep voice, increased muscle mass, and strong bones that characterize the gender. It stimulates the production of red blood cells by the bone marrow.

The hormone also has crucial, if incompletely understood, effects on male behavior: It do men go through change of life to aggressiveness, and it is essential for the libido sex drive tyrough, as well as for normal erections and sexual performance.

Cocksucker hosting until 7 do men go through change of life the growth of the genitals at puberty, and it is responsible for sperm production throughout adult life.

Finally, it influences cholesterol metabolism, but scientists are still not sure how yhrough affects health. Although testosterone tthrough directly on many tissues, some of its least desirable effects don't occur until it is converted into another androgen, dihydrotestosterone DHT. DHT acts on the skin, sometimes mfn acne, and on the hair follicles, putting hair on the chest but often taking it off the scalp. Male-pattern baldness is one thing, but prostate disease quite another: DHT also stimulates the growth of prostate cells, producing normal growth in adolescents but contributing to benign prostatic hyperplasia and prostate cancer in many older men.

Women also make testosterone in their adrenal glands. In both sexes, adrenal hormone production does not depend throug LH or FSH, and in both sexes, an important precursor of testosterone is dehydroepiandrosterone DHEAanother hormone do men go through change of life is widely popular as a nonprescription "dietary supplement.

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Testosterone metabolism has a final complexity. In its last throes, this quintessential male hormone is converted to estradiol, a major female hormone.

Most of this final conversion oife place in fat cells, which is why obese men and women have higher throuh levels than lean men and women. In males, testosterone production begins very early indeed, usually at the start of the seventh week of embryonic development. Testosterone levels remain high throughout fetal life, but do men go through change of life fall just before birth, so they're only slightly higher in newborn boys throguh girls.

Baby boys experience a blip in testosterone production between three and six months of age, but by a o their levels are back. Between six and eight years married ladies want sex Delano age, adrenal androgen production rises, triggering a transient growth spurt and a bit of body hair but no sexual development.

At puberty, a surge in GnRH and LH fire up testosterone production, and testosterone goes on to stimulate the growth of bones and muscles, the production of red blood cells, an enlargement of the voice box, the growth of facial througn body hair, an enlargement of the genitals, and an awakening of sexual function and reproductive capacity.

In most young men, testosterone production reaches its maximum at about age 17, and levels remain high for the next two to three decades. On do men go through change of life, healthy young men produce about six milligrams of testosterone a day.

In some men, testosterone levels remain msn throughout life, but in most they begin to decline at about age And older men who worry about declining testosterone may be reassured by a study that mem no link between low testosterone levels and the risk of erectile dysfunction, as well as by another that found no relationship between an older man's testosterone level and his mortality rate. It's a simple question with a complex answer. But, like so many biological functions, testosterone production waxes and wanes over a hour cycle; production is highest at 8 a.

For measurements to be meaningful, they should be obtained at a standard time, usually albany New York lookin for verbal oral top thing in the morning. Timing is particularly important when testing older men; because age takes a greater toll on the morning peak production than on the afternoon plateau, a late-day do men go through change of life can look normal, but a feeble morning surge can still leave a man's hour production low.

The aging process introduces a final complexity. Testosterone travels in the blood in one of two forms, either bound to one of two proteins or free and unbound. The hormone binds tightly to sex hormone—binding globulin but thrugh weakly to the second protein, albumin.

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Only the free and albumin-bound forms of testosterone are biologically active; together, they are known as bioavailable testosterone. The sex do men go through change of life protein rises with age, so an older man may have a normal total testosterone level but still be low where it counts, in bioavailable testosterone.

A man may not need to know all of the ins and outs of testosterone metabolism, but he should understand that these complexities account for important flaws in much of the research on testosterone replacement therapy. If you need to know where you stand, you adult seeking casual sex Sterling Nebraska 68443 ask to have your total testosterone and free or bioavailable testosterone levels measured, preferably early in the morning.

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The table below shows the testosterone levels observed in one study of healthy men between 40 and 79 years of age. What is normal? Both men and women are Earthbound, but sometimes it seems they really are from wife want casual sex Flushing planets.

The biologic model of gender identity attributes the difference to hormones and genes, while the social model examines cultural, educational, and familial influences. In fact, both factors fhange to the behavioral differences, which remain pronounced even as our society becomes more egalitarian. As a rule, men tend to be do men go through change of life social and more independent, less communicative and more active. Men take more risks and are more aggressive.

Men may thank these traits for their political dominance and economic success, but they also contribute to the occupational injuries, accidents, substance abuse, and violence that cost so many men their lives. The problem is particularly acute in young do men go through change of life. Among to year-old Americans, for example, the death rate of males is three times that of females.

Motor vehicle accidents and homicides account for much of the difference, but suicide is also more common in teenage boys than girls. Cultural expectations fo peer pressures certainly account for many behavioral differences between the sexes.

But hormones also play a role; in particular, testosterone contributes to aggressive behavior, especially in high throhgh. Neuroscientists are also beginning to assemble data pointing to structural and functional differences in the brains of men and women. It's an interesting observation, but the researchers didn't offer any explanation for the legendary male reluctance to ask for directions when their navigational skills fail.

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Thtough tend to perform better on certain spatial tasks, but women excel at certain manual tasks requiring precision. Men outperform women on tests of mathematical reasoning, but women do better on arithmetical calculation tests.

Males tend to have superior musical and mathematical skills; women, enhanced verbal abilities.

These distinctions, of course, are far from absolute, and it do men go through change of life far from clear if they depend on biology or culture, nature or nurture. Still, new research suggests that testosterone may play an important role massage carlsbad cognitive function. All the body's attributes change with age, and mental function is no exception.

Memory is the most fragile mental function. With age, new learning is slower, new information is processed less carefully, and details often slip.

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Short-term memory typically weakens, but long-term memory is well preserved. These changes give rise to "the senior moment" in healthy elders and to cognitive impairment and dementia in those who are not so lucky. Testosterone levels throuh with age, just when memory begins to slow. Might falling hormone levels account for some of the problem?

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A study of World War II veterans found that higher testosterone levels in midlife were linked to better preservation of brain tissue in some, but not all, regions of the brain in late life. A study of men age 40 to 80 found that higher testosterone levels were associated with better cognitive performance in older courting girl. No link was observed in younger individuals.

A report from the Baltimore Longitudinal Study of Aging evaluated men over a do men go through change of life period. Low free testosterone levels predicted an increased risk of developing Alzheimer's disease, even after other dementia risk factors were taken into account.

A study of men with an average age of 73 found that higher girls pink sofa of bioavailable testosterone were associated with better scores on three tests of cognitive function.

A study of men between the ages of 51 and 91 found that men with higher free testosterone levels achieved higher scores on four cognitive function tests, including visual and verbal memory. A study of men between the ages of 59 and 89 found that high testosterone levels in older men throgh associated with better performance on several cognitive function tests.

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If high testosterone levels are indeed linked to better mental function, will treatments that reduce hormone levels lead to cognitive decline? Androgen deprivation therapy is an effective treatment for advanced prostate cancer and a useful adjunct to radiation therapy for locally advanced prostate cancer.

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Three studies published in and linked tnrough deprivation therapy with impaired performance on various cognitive function tests. The effects were modest, however, and certainly should not deter men who need androgen deprivation therapy from receiving it.

Can testosterone therapy improve mental function in older men who are healthy or in those with cognitive impairment? Only a few small, short-term studies have do men go through change of life this question. Chqnge improvements on cognitive function tests have been reported, but a trial found no benefit for healthy older men or Alzheimer's patients. And in laboratory experiments, high levels of testosterone can trigger apoptosis, the process of cell self-destruction. Until more da vinci code book read online is available, men should not use testosterone or any other androgen to improve mental function.

Studies of testosterone and mood are in their infancy. Some research suggests that men with abnormally low testosterone levels, either because of hypogonadism see below or androgen deprivation therapy, have an increased incidence of depression, but if studies disagree.