One of the most embarassing conditions that guys can develop, often with aging,
is gynecomastia, or "man boobs". Sure, going bald is unpleasant, but at
least it's associated with our gender! Furthermore, getting rid of gynecomastia
is difficult at best. If a man develops breast tissue, it tends to harden
with time and can only be surgically removed.
So how can you prevent developing bigger hooters than the little woman?
Most men know that gynecomastia risk is tied into estrogen. As a man ages,
he generally tends to have higher estrogen levels and, therefore, can develop
Need to boost your Nitric Oxide naturally through food, drink and supplements? Check out Lee Myer's book here:
The Peak Erectile Strength Diet
Or do you need the most comprehensive testosterone book in Amazon? Here it is:
Natural Versus Testosterone Therapy
Of course, that is true, but there are many much more subtle reasons that one can
develop gynecmastia and, furthermore, it is often associated with many
underlying medical conditions. For this reason, anyone with gynecomastia
should get checked out, embarassed or not, and try to find the root cause.
Below are a few of the common things to watch for and prevent. However, I should
add that a good working knowledge of testosterone decreasers and estrogen
increasers is critical, because any of these could potentially lead to the
development of increasing breast tissue.
1. High Prolactin Levels and/or Prolactinoma. As you know from my
link on Prolactin and Testosterone, elevated prolactin leads to reduced
testosterone, which can skew the all-important testosterone to estrogen ratio.
It is this ratio, rather than just one hormone or the other, that is often the
problem and has been associated with gynecomastia.  Some pituitary adenomas
secrete prolactin and can lead to gynecomastia. 
CAUTION: Further evidence that elevated prolactin can lead to gyno comes from
Risperidal, an anti-psychotic. 
Risperidal increases prolactin and thus quite often has gynecomastia as a side effect. Risperidal can also
increase the risk for prediabetes and diabetes as well. Discuss any such
symptoms with your doctor.
2. Weight Gain. It is no secret that gynecomastia is often associated
with being overweight or obese. Of course, fat cells as they grow in size have
more aromatase, which converts one's precious testosterone to estrogen. Plastic
surgeons have even debated whether or not it is worth performing gynecomastia
surgery on obese patients. 
3. Hyperthyroidism. About 20-40% of men with an overactive thyroid
develop gynecomastia due to elevated testosterone, leading to elevated
estradiol-17 beta. 
4. Steroids. Steroid users are in a constant battle againts
gynecomastia. As testosterone levels are increased beyond their normal
physiological range, more and more estrogen is aromatized and users begin to
feel nipple tenderness. Some will even begin to leak liquid from their
nipples! To battle this steroid users will often take estrogen-blockers
simultaneously or immediately after a cycle as well.
5. Medications. The list of drugs that can contribute to gynecomastia
is almost endless. Here's a list from Mayo Clinic: Proscar, Valium,
antidepressants, antibiotics, ulcer and/or reflux medications, calcium channel
6. Recreational Drugs. Almost every recreational drug that you can
think of can lead to gynecomastia: marijuana, alcohol - a notrious
estrogen-increaser, heroin, etc.
7. Kidney Decline. Patients with decline and/or dialysis experience
an alteration in hormone levels such that they frequently develop increased
breast tissue. 
8. Poor Nutrition. Testosterone is dependent on many nutrients and
thus a poor diet and nutrition is often associated with decreased testosterone
and a skewed testosterone to estrogen ratio.
9. Progesterone. Elevated levels of progesterone have also been associated with
gynecomastia. This hormone plays a role in breast development in women and can do
the same in men. Read about it here in my link on Progesterone and Men. (See #3.)
1) Skinmed, 2010 Jul-Aug, 8(4):201-2, "Prolactinoma can be associated with
2) Ned Tijdschr Geneeskd, 2004 Apr 24, 148(17):809-13, "Three patients with
3) Med Clin North Am, 1975 Sep, 59(5):1109-21, "Gonadal steroids and
gonadotropins in hyperthyroidism"
4) Annals of Plastic Surgery, May 2010, 64(5):688-690, "Adolescent Gynecomastia:
Not Only an Obesity Issue"
6) Rev Med Interne, 1984 Jun, 5(2):110-3, "Gynecomastia and chronic renal
insufficiency in periodic hemodialysis. Demonstration of a decrease in the free
fraction of testosterone"
http://www.medscape.com/viewarticle/571416_6, "Use of Risperidone in
Children With Autism, Bipolar Disease, or Schizophrenia"