19 Nasty Gynecomastia Statistics & Percentage (INFOGRAPHIC)

Gynecomastia statistics

Gynecomastia affects between 50 to 65% of adolescent boys and men worldwide. This is according to statistics collected by the National Institutes of Health (NIH).

Gynecomastia is the development of excessive mammary gland tissue in men – the development of “man boobs” at various levels of severity.

These are mostly distinct from concerns like ‘puffy nipples’ – the natural enlargement or texture of some individuals’ areola.

For many men, it’s a condition that damages self-perception, even with changes in body composition.

It’s also typically a condition that shows up in either the teen years or during the ‘mid-life’ period – two times when it’s easiest to get caught up with self-image.

Let’s look at some key statistics around Gynecomastia; its prevalence, cause, and treatment.

You can learn everything you need about it in just 18 key points.

Gynecomastia Prevalence Statistics: How Many Men Have Gyno?

  • Gynecomastia is estimated at a minimum of 4% of boys from teenage onwards. This means that it doesn’t affect everyone but does have a strong presence.
  • The highest population for Gynecomastia is men aged 50-69, with a 70% rate of Gynecomastia. This is because of the hormonal changes in men’s bodies as they age – with more testosterone turning into estrogen and less natural counter-balances.

highest population of gynecomastia

  • The whole-population occurrence of Gynecomastia is estimated to be 30% based on cohort studies and medical record analysis. These might not be 100% representative of the population, but they suggest that many men have developed asymptomatic breast tissue enlargement by middle adulthood.
  • An unidentified but significant portion of steroid users (estimated at 20-50%) experience some form of Gynecomastia – either temporary or persistent – associated with PED use. This is due to the higher testosterone levels converting into estrogen-analogs, which can be blocked with anti-aromatization drugs.
  • 60-90% of neonates present with the hormonal symptoms of Gynecomastia – but typically resolve themselves rapidly. These are mostly related to the development process and onset of sex-specific characteristics during the latter months of pregnancy and newborn life.
  • Gynecomastia becomes present at age 14 for most men due to hormonal changes – an unfortunate time for the ever-self-conscious teenager! Consider discussing these conditions with a doctor sooner rather than later as a parent or teenager.
  • Clinical (but not symptomatic) gynecomastia has been estimated to be as high as 65% in men who saw doctors for other conditions. This is an important indictment to talk to a doctor if you’re experiencing Gyno as a potential sign of other problems.
  • 58% of gynecomastia patients had a family history of the condition in some studies, which indicates a significant genetic component – may be the conversion rates into estrogen and sensitivity of breast tissue to hormones.

Gynecomastia Health Statistics: Is Gyno Dangerous?

  • 75% of gynecomastia cases are resolved within two years of medical treatment, which is even more reason to talk to your doctor. In these cases, associated risks like breast cancer are expected to be reduced significantly.
  • Most cases of Gynecomastia are treatable – either naturally, through anti-aromatization compounds, compression clothing, or surgery. As above, 75% of cases resolve within two years, and more within longer periods.

gyno cases resolved

  • In 83% of cases, Gynecomastia was co-morbid with a prior health condition – so be sure to check in for more serious concerns! It’s important to consider health risks ahead of aesthetic concerns.

gynecomastia prior health condition

  • Only around 1% of gynecomastia cases are malignant, but that’s still 1-in-100, and you should get checked if you have any concerns. 1% of people experiencing significantly increased breast cancer risk still means unnecessary deaths that could be prevented with earlier check-ups.
  • Men with Gynecomastia in their 20s are most at-risk for other conditions – often signaling serious hormonal health problems or underlying medical conditions. This overlap means that Gyno is a good early sign for other problems to be addressed, which may help fix your Gyno.
  • 25% of men with Gynecomastia in their 20s experience clinical hypogonadism. This major hormonal problem is associated with other health problems like mood disorders and metabolic decline.
  • 9% of men with Gynecomastia aged 19-29 also experience hyperprolactinemia. This is a condition in which men have heightened prolactin levels in the bloodstream, causing a wide range of unwanted physical changes and increasing some risk factors (as in breast cancer).
  • 4% of men with Gynecomastia in their 20s have chronic liver disease (potentially associated with alcohol and steroid use problems). This is a major health problem as liver failure and disease are common quality of life or mortality risks.
  • And 4% of men diagnosed with severe Gynecomastia in their 20s have drug-induced health problems (potentially associated with steroid use). These are common problems but may also overlap with other compounds like HGH, drug abuse, or improper use of prescription medications.
  • Tamoxifen has been shown to address Gynecomastia with success rates as high as 84% in a study of Chinese men. This is also a common anti-aromatization compound used in steroid cycles to prevent Gyno and other aromatization problems – with improper ‘cycles’ and use potentially causing many cases of (often resolvable) Gynecomastia.

Gynecomastia Statistics FAQs

What percentage of the population has Gynecomastia?

It’s hard to say how many people have real Gynecomastia – as it’s a condition with a graded scale, and many people do not get the condition diagnosed.

However, up to 70% of men over 50 experience gynecomastia at some level.

In younger men, the cases are far less common, though estimates still go as high as 30% of men at some stage in life.

The lowest numbers suggest that a minimum of 4% of teens will experience Gynecomastia.

How common is Gyno from testosterone?

Gynecomastia is very common with testosterone supplementation – especially the transient kind that comes and goes when use ceases.

This also depends on using anti-aromatization aids like Armidex (Anastrozole) or Nolvadex (tamoxifen).

There are no clear statistics on how common Gyno is.

But anecdotal evidence suggests that 20 – 50% of steroid users will experience breast discomfort, puffiness, or changes during use.

Does everyone get Gynecomastia? (no)

No, Gynecomastia isn’t ubiquitous in young people, though it does become very common in older men.

Estimates from cohort studies go up to 70% for men over 50, though rates below this age are significantly lower (from 4% to 30%, depending on categorization).

What are the stages of Gynecomastia?

There are many types of Gynecomastia – and they have different stages.

These use grades or stages:

  • Grade 1: Minor breast enlargement around the glandular tissues – typically associated with ‘puffy nipples.’
  • Grade 2a: Enlargement of tissues at noticeable levels – without symptomatic change to the skin.
  • Grade 2b: Enlargement of mammary tissue, with changes to the shape of the nipple and stretching of the skin.
  • Grade 3: Pronounced breast enlargement with a change of nipple shape, excess skin stretching, and changes to the shape of the whole breast area.
stages of gynecomastia
source: thebjm

If you’re concerned about Gynecomastia, contact your professional medical sooner rather than later.

Early interventions are more effective, and if there are no risks, peace of mind is always good – especially with associated health risks!

What Age Do Men Get Gynecomastia?

Gyno can be seen in anyone from children to the elderly.

Rates are relatively low in children, where it is most commonly associated with poor fetal hormone balance and the aromatization of DHEA and DHEA-SO4 into Estradiol.

Rates are 4%-30% in teen boys and then rise through a man’s “mid-life,” with around 70% of men aged 50-69 experiencing at least Grade 1 Gynecomastia.

What treatments are available for Gynecomastia?

Treatment for Gynecomastia depends on the cause, type, and severity.

Compression is a common management solution, while steroid-induced Gynecomastia involves the cessation of anabolics and proper anti-aromatization medication.

For more severe cases, surgery is available but can be invasive and carries some risks.

You should discuss your particular case with your doctor.

Gynecomastia Facts and Statistics Infographic

Gynecomastia Facts & Statistics Infographic
Gynecomastia Facts & Statistics Infographic


Gynecomastia can be a disheartening condition to grapple with, but the statistics suggest that it’s very manageable with proper support and lifestyle.

It’s important to discuss the condition with your doctor to make sure you’re safe – and potentially pursue effective conservative treatment.

With the optimistic statistics in treating it, why suffer from embarrassment or a negative self-image.

Conditions like this are incredibly common and shouldn’t be a source of shame or embarrassment, especially when the medical field is getting so good at treating them!

Joseph P. Tucker

Joseph P. Tucker is a co-founder of this tiny space, a husband to a beautiful wife, and a fitness enthusiast. He is passionate about helping others achieve their fitness and wellness goals, and he loves nothing more than spreading the gospel of health and nutrition all around the web.

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