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Man Boobs And The Estrogen to Testosterone Ratio

by Garry Davidson

Estrogen to Testosterone Ratio

Man boobs occur when your chest is exposed to a high estrogen to testosterone ratio. This is when you have high levels of the female hormone estrogen, and/or low levels of the male hormone testosterone.

Why You Can Still Get Man Boobs If You Have Normal Hormone Levels

It’s important to note that you can also get man boobs when your hormone levels are normal, and your breast tissue is just more sensitive to normal levels of estrogen, or less sensitive to normal levels of testosterone.

Just like hormone levels, breast sensitivity to hormones changes in response to your environment. Many (though not all) of the same factors that cause estrogen levels to rise, also cause an increase in the sensitivity of your breast tissue to estrogen. The same applies to testosterone.

So generally when I talk about rising and falling levels of these hormones, know that I’m also referring to falling and rising breast sensitivity to these hormones.

Where you can test your hormone levels using salivary and blood tests, there is no way to test for the level of sensitivity of your breast to these hormones.

Changing breast sensitivity to hormones is an important aspect of breast development that a lot of guys don’t know about. Many of my clients find their hormone levels are normal, and this just means that their breasts are more sensitive to estrogen and/or less sensitive to testosterone because of estrogen/androgen receptor abnormalities. These abnormalities can be acquired from exposure to environmental toxins, or from birth because of hormone exposure from the mother’s womb.

Some people are just born with more estrogen-sensitive breasts, which is why man boobs tend to run in the family.

Whether your hormones are normal or abnormal, natural male breast reduction techniques can go a long way in helping you to reduce the size of your man boobs.


The female sex hormone estrogen is what’s responsible for girls developing breasts during puberty. Some years ago, I read a newspaper article that talked about how women’s breasts nowadays are bigger than they were just 20 years ago. This is happening because women are now being exposed to higher levels of estrogen than ever before.

As a guy, you probably think this is awesome, but not when you find out what these high levels of estrogen are doing to us men. Not only does high estrogen exposure cause men to grow boobs, it also affects the hypothalamus and pituitary gland in the brain, leading to decreased testosterone levels, reduced sperm count, reduced fertility and reduced libido. It also makes it difficult for us to lose weight and put on muscle. All in all, increased exposure to estrogen is making us men more feminine.

Although man boobs and our masculinity is a huge concern to you and me, there isn’t much scientific literature out there to pinpoint why men are becoming feminized. But what we do know is that man boobs are caused by estrogen. Estrogen has been studied extensively because of its strong link to the third most common cancer in the world – breast cancer.

Most things that increase a woman’s chance of developing breast cancer, will also increase a guy’s chance of growing man boobs. Knowing this, we can now analyze the scientific literature on breast cancer, and deduce important facts about man boobs.

One thing we know is that breast cancer has been on the rise worldwide ever since the explosive growth of the chemical industry in the 1940s. We don’t know this for a fact, but I wouldn’t be surprised if man boobs didn’t go on the rise at around the same time.

Unfortunately, whether you live in a developed or developing country, estrogen and estrogen-like particles called ‘xenoestrogens’ have somehow managed to become some of the most abundant chemicals we’re exposed to every day.

Thanks to the multi-billion dollar global chemical industry, estrogen is everywhere in the modern environment. Estrogen is abundant in our water supplies, and estrogen-like particles are found in the vast majority of foods available to us. Car exhaust fumes contain estrogen-like particles that we inhale through our lungs. Even the cosmetics we apply on our skin (including deodorants) contain estrogen-like particles that are easily absorbed through the skin.

In later articles (like this onethis one, and this one) I’ll be giving you some of the best tips and tricks on how to lower your estrogen levels right down. So keep your eyes peeled.


Androgens are male sex hormones. Testosterone is the primary and most well-known androgen.

Testosterone is responsible for boys developing a deeper voice, increased muscle mass and increased body hair during puberty.

Testosterone does a hell of a lot more than this though. Optimal testosterone levels help fight depression, decrease body fat, increase muscle mass, delay aging, strengthen your heart, strengthen your bones, increase libido, improve erections, improve cognitive functioning, and have many other physical and psychological benefits.

Having optimal testosterone levels can have a HUGE positive impact on your life. Having low testosterone on the other hand, gives you the opposite of everything I just listed in that last paragraph. Another thing low testosterone gives you is man boobs… which really doesn’t help.

Your testosterone levels are closely linked to estrogen via the hypothalamic–pituitary–gonadal axis. The hypothalamus and pituitary being portions of your brain, and the gonads being your testes. When estrogen levels go up, your testosterone levels go down.

In a 2010 study in the Journal of Clinical Endocrinology and Metabolism, the researchers concluded that over the past 20 years, there has been “substantial age-independent decreases in male serum T concentrations”.

Today, the average male has a testosterone level that is 15-50% (depending on the study you read) lower than it was 50 years ago. So there’s no wonder then why rates of male fertility have plummeted in recent years.

Studies have shown that in the past 50 years, the quality of sperm has dropped by 42%, and the quantity by 50%. In the past 20 years the decrease in sperm counts has occurred at a rate of 2% each year.

Increases in estrogen and decreases in testosterone are literally transforming men into women. No wonder we’re growing breasts!

The good news is there are some very simple and easy methods you can use to boost your testosterone levels. Boosting testosterone will also help to reduce estrogen levels. Not only will this help to get rid of your man boobs, it will also significantly increase the quality of your life. It’ll help you lose weight, increase your muscle mass, improve your libido and virility as a man.

To find out about easy methods you can use to both boost testosterone and reduce estrogen, please take a look at How To Boost Testosterone Naturally:

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11 Comments on "Man Boobs And The Estrogen to Testosterone Ratio"

Mike Gonzalez
4 months 12 days ago

Hi there, so as a child I suffered from testicular torsion consequently having my testicles removed. As I reached my teenage years I was quite skinny but I realized when I was playing football I would wear DriFit shirts and I started to notice how I looked in my chest area, I then thought that I was forming man boobs as a young teen which took a shot at my confidence. I started to go for runs. I worked out but only a couple times a week but only because I was too tired from year around baseball and especially practices. I did not notice a change in my body physically, being pubic hairs armpit hair facial hair or anything I should say I was not going through puberty. My primary physician noticed that I was relatively small in my area and referred me to an Endocrinologist. It was there that I was prescribed Testosterone shots, I started off with 50 mg with and every month to month shot,I then made my way up to 200 mg every month and my Endocrinologist decided recently to knock me down 50 mg concluding me to 150 mg every 2 weeks. I told my new Endocrinologist (I was given a new one because I turned 18) I was having chest pains my mainly on the left side of my chest being my left boob. I am not quite sure what to think about this or what you think I should do about this. I am 5’10 weighing 185 and I started developing stretch marks on my hips and underneath my armpit. If you could get back to me as soon as possible that would be great. Thank You.

Ryan abubakar
5 months 29 days ago

hey! awesome and very detailed explanatuon there, im an 18 yr old dude and im having a serious issue with man boobs, i used to be really skinny but about 5 years back, i started gaining weight like crazy……mostly muscle at the time but not anymore, im 6″3 and 93 kilos.
i have a big butt and really noticable man boobs,…….i think im a bit forgetful but nothing serious, i have a reasonably deep voice, i do get alarmingly angry sometimes, and have issues with depression and insomnia,im also quite hairy on my body and face although i havent really grown a full beard. ……….i am actually quite a bit overweight but not FAT ,cuz i have a big belly and thighs along with a very big butt

i actually havent seen a doctor but i think its obvious that my hormones are a bit fucked up…….

….i need your advice cuz my physique is really killing my confidence and social standing, i intend to join a gym but……i start college in a few months so i really cant afford to pay for all those supplements along with anti-estrogens etc

sorry for the long post but im desprate!
thanks bro

Karl Casias
7 months 1 day ago

I am 53 year old male,weight 185 6ft pretty forgetful,low energy,decreasing sex drive,with mild depression.Suspect I might have excess estrogen/lower than normal testosterone[under 400] what would be a good ratio of testosterone to estrogen and can a blood test show me the correct numbers.

1 year 9 days ago


I have been noticing that my left chest mass has been incresed in the past few years, I am 23 years now. I used to be in shape few months back but since i have been out of shape. I'm feeling that only the left chest is increasing like man boob. I can feel a bit of a mass under left chest. I also have puffy nipples most of the time and need to pinch it to get to normal shape. My right chest size is normal. Could you please suggest the problem and the solution.

10 months 22 days ago

Hi Dave

Unilateral gynecomastia is more likely to be associated with an underlying disease process, so the first thing you should do is to see a doctor. This is especially important seeing as your left man boob is still growing at the age of 23.

Althea Jacobs
1 year 2 months ago

Yes, I am interested in knowing your thoughts on boosting testosterone levels for I have a son with a condition that causes him to have low t levels and high estrogen levels. He has the “man boobs” and is very uncomfortable about it. Please help, any advice/suggestions would help.

1 year 2 months ago

Hi Althea, thanks for the question. Sorry to hear about your son’s condition. Might I ask what this condition is? Has the doctor offered any help with medical therapy? And how old is your son? How long has he had his man boobs for, and how big are his man boobs? Does he have any tenderness behind his nipples?

There is so much I could talk about when it comes to boosting testosterone naturally. I intend to do a detailed section on testosterone on my website in the future. One reliable source of free information is I also discuss how to boost testosterone in a way that helps get rid of man boobs, in my program, How To Lose Man Boobs Naturally.


Pssst! Want to lose your man boobs?

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