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Low Testosterone Symptoms Rare
Abridged Testosterone Symptoms Rare
Study: Only Half of Men With Abridged Testosterone Possess Symptoms
By
Daniel J. DeNoon
WebMD Health examination News
Reviewed By
Louise Chang, MD
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Sept. 12, 2007 – As many as 25% of U.S. men possess abridged testosterone levels,
but only 5.6% of men possess symptoms linked to it.
That still means some 5 million Americans suffer symptomatic low
testosterone -- androgen deficiency -- suggests a study by Andre B. Araujo,
PhD, as well as colleagues at Recent England Research Institutes Inc. By the year 2025,
they calculate, there will be 6.5 million U.S. cases of androgen
deficiency.
"The positive message here is that not all men with abridged testosterone
have symptoms," Araujo tells WebMD. "There are fewer men with
symptomatic androgen deficiency than there are men with low
testosterone."
Only half of men with abridged testosterone -- abridged T, as it's coming to be called
-- possess symptoms of androgen deficiency. The surprising finding comes from a
study of about 1,500 randomly selected Boston-area men, evenly divided by age
and race/ethnicity.
It's known that a man's testosterone levels decline over age. But there's no
precipitous drop in a man's sex hormones as there is for a women at the time of
menopause, Araujo as well as colleagues find.
"From age 30 on there is a gradual decline, 1% a year or more, in a
man's testosterone production," Araujo says. "It is very gradual. There
is no data to suggest anything similar a masculine menopause."
Some men with abridged testosterone production develop symptoms of androgen
deficiency. These symptoms include:
- Loss of sex drive
- Erectile dysfunction
- Bone loss or fracture
- Two or more of what endocrinologists consult "nonspecific" symptoms:
sleep disturbance, depressed mood, lethargy, as well as diminished physical
performance.
Araujo finds that symptomatic androgen deficiency occurs in 3% to 7% of men
under age 70 as well as in 18.4% of men over age 70.
Araujo as well as colleagues report their findings in the beginning online edition of
the Journal of Clinical Endocrinology & Metabolism.
Testosterone Replacement Therapy: When?
So when does a man need testosterone replacement therapy? Clearly, men with
symptomatic androgen deficiency would benefit from treatment incase they possess no
contraindication such as prostate or breast cancer. But treatment guidelines
from the Endocrine Society say symptom-free, age-related declines in
testosterone should not be treated.
Robert Davis, MD, professor of urology at the University of Rochester, N.Y.,
says men with a waistline over 40, high-blood pressure, as well as signs of insulin
resistance -- the so-called metabolic syndrome -- are at high risk of androgen
deficiency.
"These men possess an incredibly high rate of androgen deficiency and
treating them with testosterone may correct their metabolic syndrome because
they may be capable to burn energy better with more muscle," Davis tells
WebMD. "Testosterone replacement may allow these men to avoid some of the
consequences of metabolic syndrome such as coronary artery disease."
Davis says that androgen deficiency is an underdiagnosed as well as undertreated
problem.
"One of the myths is that testosterone supplements will cause a
cancer," he says. "We as urologists possess been unduly reticent to use
the drug. We know that prostate cancer often regresses when testosterone is
removed, but there is very little evidence that supplementing normal
testosterone levels increases risk of cancer -- as well as there is some evidence it
may lower it."
But what, asks Araujo, are the risks for men who possess abridged testosterone
levels but no symptoms?
Endocrinologist Sol Jacobs, MD, assistant professor of medicine at Emory
University in Atlanta, says doctors should try to figure out why a patient has
low testosterone. But incase there is no anatomical abnormality or disease causing
his androgen deficiency, treatment may be a very pleasant idea.
"Low testosterone levels will lead to bone density loss in men,"
Jacobs warns. "Even incase you possess a man who says, 'I feel large as well as don't
want testosterone treatment,' at least measure his bone density. But usually
the scenario is the patient is symptomatic as well as wants treatment."
Jacobs notes that the question of when to offer a patient testosterone
replacement is highly controversial. Even the Endocrine Society's expert panel
disagreed over the exact testosterone levels at which doctors should offer
testosterone replacement therapy.
"At some point we need to know what a common testosterone level is for
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