Testosterone is essential for maintaining muscle strength, bone density, stamina, libido, and sexual function in both men and
women. Optimal levels of testosterone are essential for optimal health and quality of life. Testosterone levels decline with age
in both sexes. Men lose their testosterone gradually after age 25, causing fatigue, depression, decreased
strength, loss of libido, and mental slowing. Because male andropause is gradual and is less drastic than female
menopause, men think that they are "just getting old", so they don't grasp the hormone connection and the need for
hormone replacement. In men, testosterone restoration to higher levels with the reference ranges improves mood, energy,
strength, muscle mass, and stamina. Studies show that higher levels of testosterone within the reference range protect
against cardiovascular disease, diabetes, dementia, hypertension, abdominal obesity and arthritis. Several studies have
shown that testosterone replacement by injection helps reverse metabolic syndrome in men. Nearly every study of
testosterone and heart attacks shows that men with lower levels of testosterone have higher risk. Indeed, when
men with prostate cancer are treated with androgen deprivation therapy--where their testosterone level is lowered to that of a
woman and their estradiol levels become extremely low--they develop heart disease, diabetes, and metabolic syndrome.
Women's testosterone levels are 20 times lower than men's, but testosterone is essential to their health and
quality of life too. Testosterone brings the same benefits to women as it does to men, only on a smaller scale. It not only
restores their libido, but also improves sleep, mood, mental function, bone mass and muscle strength. Women have higher
free testosterone in the follicular phase of their menstrual cycle than free estradiol! Women's testosterone levels drop by
50% between the ages of 20 and 40. The majority of women in their 40s and 50s are suffering from low testosterone levels.
Unfortunately lab reports state that the "normal" free testosterone for a woman is 0-2.2pg/ml, or a total of 2 to 45ng/dL. So a
physician practicing Reference Range Endocrinology will tell her that she's "normal" even if there is no detectable
testosterone in her blood! Optimal levels for most women are in the middle to upper part of the ranges.
The loss of libido with loss of testosterone can have a devastating effect upon relationships. The partner whose
libido is low may think that they are just no longer attracted to their spouse. They may still be excited by other persons
because they are new, unknown, or have other qualities their spouse lacks (i.e. a super-stimulus). On the other hand, the
partner who has not lost their libido will think that the other partner is no longer attracted to him/her. Dr. Lindner has seen
relationships improve when testosterone and libido are restored in one or both partners. For certain, if the libido
is healthy, one is happy to "love the one you're with"! When couples enjoy sex with each other again, all aspects of the
relationship improve. Postmenopausal women require estradiol supplementation to restore youthful vaginal/genital health
and lubrication. Estradiol also plays a role in normal libido.
The conventional population reference ranges cannot be used to diagnose testosterone deficiency in men as levels decline
with age, and the reported range includes almost all men in that age group. Therefore the lower limits are far too low
for both health and quality of life. For instance, a typical range for free testosterone for a middle-aged man is 6 to 18 pg/ml.
That's a three-fold difference from bottom-to-top! Surely a man will feel very different with 1/3 his previous levels or 3
times his current low levels! For younger men, the upper limit is not 18 but 26.5 pg/ml. In Dr. Lindner's experience, men feel
and function much better with free testosterone levels of around 20 pg/ml.
Contrary to popular opinion, scientific studies show that higher levels of testosterone Do Not cause prostate
enlargement or prostate cancer. Studies of men on testosterone replacement have consistently shown there is no
increased risk of prostate cancer. In fact, the evidence is clear: It is LOW testosterone levels that increase the risk
of prostate cancer! (See Testosterone for Life by Dr. Abraham Morgentaler.) The misconception that higher
testosterone levels cause prostate cancer is due to the fact that an existing prostate cancer will grow more slowly if
testosterone levels are brought very low by castration or drugs. This is an issue of cancer management, not of cancer
As with other hormones, conventional medical opinion about testosterone is lagging way behind the scientific evidence. Here
again, as with the female hormones, lay persons and most medical professionals think that the problems caused by artificial
hormone substitutes also occur with natural, physiological hormone restoration. "Roid rage" and liver disease are caused by
non-bioidentical anabolic steroids and oral 17-alkylated testosterone substitutes. Contrary to popular misconceptions,
testosterone restoration does not cause aggression or anger. It makes men more patient, more sociable, and less prone to
anger. They have more affection for, and patience with, half of the human race! They feel more energetic and vital.
For men, Dr. Lindner prescribes weekly testosterone cypionate injections. These are self-administered subcutaneously, not
intramuscularly. This is the best way to restore optimal testosterone levels/effects, it best mimics normal testicular production.
The testosterone-containing creams and gels are more expensive, very difficult to monitor, produce abnormal
DHT/testosterone/estradiol ratios, and can result in transfer to other persons..
Much concern has been caused (and a lawyer feeding-frenzy started) by a few recent retrospective studies showing th
at men's risk of a heart attack is increased after they have been prescribed testosterone. These studies are low-quality ev
idence--not even close to the gold standard of randomized, placebo-controlled trials. All other evidence, and all other reviews
of the evidence that has accumulated over the past decades indicates that higher natural testosterone levels are protect
ive against heart disease and heart attacks, and that testosterone supplementation does not increase heart att
ack risk. This issue was discussed in a recent review article. A careful review of one of these recent studies (Vigen et
al.) revealed that errors were made with gathering evidence and with the statistical treatment. The authors have already
made two corrections. The rate of heart attacks in men taking testosterone was actually half the rate of those not given te
stosterone; whereas the study reported the opposite. Dr. Lindner knows of only one possible cause for concern with
testosterone supplementation and thrombotic events--and that is related to the way in which testosterone is delivered.
Most men in these recent studies were given testosterone by transdermal gels or by injections. Injections are typically given
as 1ml every two weeks. This produces very high, double/triple the reference range, testosterone and estradiol levels for a
week, then low levels in the second week. Transdermal testosterone gels can cause unnatural elevations levels of DHT and
estradiol. Higher estradiol levels do slightly increase blood clotting tendency. So sudden and superphysiological increases in
estradiol with these delivery methods may promote clot formation in those men who have advanced atherosclerosis--who are
basically a heart attack waiting to happen. Men with low testosterone levels are more likely to have atherosclerosis.
Estradiol is very good for men in the long-term, as it is for women. It offers protection against atherosclerosis and heart
attacks, diabetes, dementia,and other health problems. so while testosterone replacement by any dose or route reduces the
long-term risk of atherosclerosis and heart attack, it may increase the short-term risk--further study is required. For this and
other reasons, Dr. Lindner decided years ago to prescribe testosterone only by weekly, self-administered subcutaneous
injections. This method alone produces the full benefits of testosterone restoration, stable levels, and natural
testosterone/estradiol/DHT ratios. Testosterone patches also produce physiological replacement, but are usually too weak
to produce optimal testosterone levels. Given these recent studies, he also recommends that for older men with very low
testosterone levels and possible atherosclerosis, testosterone injections be started at a low dose, and the dose gradually
increased to a full replacement dose that produces testosterone levels in the upper half of the reference range, as averaged
over the week. Dr. Lindner also recommends that all patients take fish oil (2500mg/day of EPA+DHA) which reduces the
blood's clotting tendency.
For Health and Quality of Life