What Country Has The Highest Testosterone?

Article updated 11/14/23. Major updates in progress – some of this info is out of date until we finish updating. Please note a lot of this data is weak & doubtful. But we are still publishing this info, out of interest. More info on the data and our process here.

Testosterone varies a lot around the world. We found hundreds of studies from all around the world. According to the studies, men who live in countries like Uzbekistan and Nigeria have high testosterone, while the men who live in countries like the USA and Brazil unfortunately have unhealthy low testosterone. (But a few decades ago the low testosterone regions had pretty high testosterone too! We have the data for that as well. Bad diet, bad health, and chemicals in the environment, called endocrine disruptors, are probably what is causing testosterone to fall around the world.)

Testosterone levels in each country of the world

The Highest Testosterone in the World

Testosterone has been falling since the early 1980’s at least. For this reason, we are only looking at data from 2000 or later here. Around 2012, the region with the highest testosterone we’ve seen is Chita, Russia, where the men at an average age of 34 have testosterone levels of 1022 ng/dl! (source) Now, testosterone declines with age, and studies are done on all different age groups. To make the studies comparable, we’ve come up with a way to calculate what a normal male population of all ages would have as their average testosterone, and we’ve done this to all the studies to make them comparable. So Chita, Russia gets corrected to 905 ng/dl to reflect a population that includes all ages. 905 for the whole population is the number that we’ve found to be the highest on our list. Chita is in southeast Siberia, a little above Mongolia.

Testosterone levels across Russia and the surrounding area

The next highest number is from Peshawar, Pakistan. This is the part of Pakistan where the Pashtun people live, close to Afghanistan. At age 18-25 around 2016, men in Peshawar had testosterone of 1090 ng/dl. (source) That age corrects to 893 ng/dl.

Testosterone levels in Pakistan

In Chiang Mai, Thailand, the Hmong people have 975 ng/dl testosterone at an average age of 37. That corrects to 884 ng/dl. (source)

In Ibadan, Nigeria, men with an average age of nearly 38 have 940 ng/dl testosterone, which age corrects to 858 ng/dl. (source)

These are the top 4 highest testosterone places I’ve seen (from recent times, with good data.) Some of these countries have very different testosterone levels in different parts of them, however. We made this contour plot of testosterone levels, without artificially sticking to country boundaries. You can see that there’s a lot of variation across the world.

Contour plot of current testosterone levels worldwide
Click to see larger.

The above map is available in full resolution (some 6000 pixels) by clicking here. Details and sources for all the datapoints on the map can be found in our spreadsheet here.

The Highest Testosterone Countries

While much of Siberia has very high testosterone, most Russians live thousands of miles to the west. So we can’t really say that the testosterone in Chita reflects the average testosterone in Russia as a whole, which we calculated (using our available data and a weighted population average) to be 547 ng/dl.

For the following info, we’ve averaged studies together to represent a large piece of a country or we’ve tried to pick areas that are as representative as possible of where much of the population of a country lives.

Here are the Top 5 testosterone levels of countries from which we could find acceptable data, adjusted for age by us when possible:

  1. Uzbekistan – 773 ng/dl testosterone (Tashkent)
  2. Cameroon – 731 ng/dl testosterone (Djutitsa)
  3. Azerbaijan – 694 ng/dl testosterone (Baku)
  4. Mongolia – 693 ng/dl
  5. Ethiopia – 671 ng/dl (Addis Ababa)

Testosterone levels in the rest of the world

Here are the average testosterone levels in the countries, age-adjusted.

Bar graph of testosterone by country

Testosterone trends from 1960 to present in the different regions of the world
Click for full size

Detailed info on testosterone by country

Below, we show detailed info on testosterone levels in each country for which we have data. The charts contain all the usable, relevant data we have. The detailed data, including raw numbers, locations, dates, notes on how we used the data, and of course links to the sources, can all be found in the master spreadsheet you can download here.

Table of Contents

Testosterone levels in the Anglosphere
In the Balkans
The Baltic
The Caribbean
The Caucasus
Central America
Central Asia
Central Europe
East Asia
Eastern Europe
Persian Gulf (The small Gulf states)
The Levant (Israel, Palestine, Jordan)
Middle East
North Africa
Northern Europe
South America
South Asia
Southeast Asia
Southern Europe
Sub-Saharan Africa
Western Europe
New Caledonia (island in the South Pacific)

You can also see all the charts all at once in one very large image here if you want to compare. (Be careful when doing visual comparisons because not all these images have the same vertical scale, unfortunately. So make sure to check the scale first.)

Testosterone levels in the Anglosphere

Anglosphere current average: 434.5 ng/dl

Britain: 521 ng/dl (averaged all post 2010 data, after first averaging two separate results from Manchester)

USA: 459 ng/dl (NHANES 2015-2016 data, analyzed by me.) Full, detailed USA article here.

The testosterone trend in the USA from 1960 to 2023

New Zealand: 428 ng/dl (a single datapoint from “University of Otago and from the staff of the Dunedin Public Hospital”)

Australia: 403 ng/dl (averaging recent data)

Canada: 402 ng/dl (a single datapoint from suburban Ontario)

Testosterone levels in Canada

Ireland: 394 ng/dl (a single datapoint from the early 2000’s, and I’m not certain whether it was measured in the morning, which makes a big difference. So testosterone levels could definitely be different than this in the current day)

Testosterone in the Balkans

Balkans current average: 486.5 ng/dl.

Bulgaria: 534 ng/dl (single datapoint from early 2000’s)

Greece: 448 (averaging recent datapoints)

Romania: 394 (a single datapoint)

Serbia: 570 (averaging recent data)

Croatia: 752 in “Zagreb area, including various parts of Western Croatia” in 1987. I don’t know what testosterone currently is in Croatia, however.

Testosterone in the Baltic Region

Baltic average: 367.7 ng/dl.

For whatever reason, testosterone has gone really low in the Baltic. We only have historical data from Estonia, but that shows that testosterone didn’t used to be low here.

Estonia: 369 ng/dl

Latvia: 342 ng/dl

Lithuania: 392 ng/dl

Testosterone in the Caribbean

Average: 500 ng/dl

Cuba: 438

French West Indies: 562 (data from mid 2000’s only)

Testosterone in the Caucasus

Caucasus average: 655 ng/dl

Azerbaijan: 694 ng/dl in Baku.

Testosterone in Baku may have risen quite a lot since the late 80’s, which is very unusual.

Testosterone in the Karabakh highlands of Azerbaijan is low because high elevation effects testosterone.

Russia in the Caucasus: 616 ng/dl (more info in the Russia section)

Armenia: 556 in 1980. Unknown what it is currently.

Testosterone in Central America

Central America average: 393

Honduras: 374

Mexico: 412

Testosterone in Central Asia

Average for Central Asia: 511. But this isn’t a very useful figure. Kyrgyzstan is low because of elevation, and Kazakhstan and Uzbekistan have very different levels!

Kazakhstan: 356. I don’t know why Kazakhstan has fallen so low, but they apparently have a big problem with urological defects and such things currently, so that suggests there is some kind of powerful environmental damage going on there. Possibly it could be heavy pesticide exposure or the results of Soviet nuclear testing.

Kyrgyzstan: 405 (these levels are low because of the effects of elevation on testosterone levels)

Uzbekistan: 773 in Tashkent.

Testosterone in Central Europe

Average for Central Europe: 410 ng/dl

Austria: 438 (data from early 2000’s only)

Czechia: 315

Slovakia: 414

Switzerland: 472

Testosterone in East Asia

Average for East Asia: 494.25


China: 521 (From this study using data from many locations supposed to be representative of all China)

Testosterone levels across China

Chinese locations vary in Testosterone
  • 593 ng/dl among Uygurs in Xinjiang
  • 566 in Fangchenggang
  • 507 in Tibet
  • 486 in Zunyi
  • 443 in Shanghai
  • 436 in Fucheng County
Testosterone levels in the eastern half of China versus the western half

Over 90% of people in China live in the eastern half. (source) Testosterone seems to be lower in the eastern half than in the outlying western parts of China, Xinjiang and Tibet.


Japan: 502

South Korea

South Korea: 462


Taiwan: 492 (From a health screening thing with 35 centers which i guess means its representative of all Taiwan, from 2007-2017)

Among the “aboriginal Taiwanese,” however, testosterone is 399 ng/dl in 2012. (source) (Data age adjusted by us, raw data is 395 ng/dl at age 51.34)

Testosterone in Eastern Europe

Eastern Europe average: 404.

Testosterone in a lot of Eastern Europe has fallen pretty hard, same as the Baltic area. Effects of Chernobyl? I don’t know.

Belarus 356

Poland 373

Ukraine 404

Russia in Europe 483 (more info under Russia)

Testosterone in the Persian Gulf region

Gulf states average: 399.7

This is the small Gulf states, Bahrain, Kuwait, and Quatar. We categorized Iraq, Iran, Yemen, and Saudi Arabia under “Middle East” instead.

Bahrain: 346

Kuwait: 379 (data from mid 2000’s only)

Quatar: 474

Testosterone in the Levant

Average for the Levant: 430

Israel 395 (From a representative population study from 2016-2019 (young age though)

Jordan 488

Palestine 407

Testosterone in the Middle East

Average for the Middle East: 530

Iran 490

Testosterone levels across Iran

Iraq 500

Saudi Arabia 599

Yemen 531

Testosterone in Mongolia

Mongolia: 693 ng/dl

Testosterone levels in North Africa

Sudan: 588 ng/dl (averaging recent results)

Algeria: 563 ng/dl currently, which is an average of the most recent data. You can see it’s fallen from 645 ng/dl in Annaba, Algeria in 1976.

Testosterone levels in Algeria

Egypt 521

Morocco 497

Tunisia 532

Testosterone in Northern Europe

Northern Europe average: 475

Denmark 566 – Interesting as testosterone here appears to be coming back up, which is unusual.

Finland 375

Iceland 502

Norway 443

Sweden 489

Testosterone levels in Russia

Russia’s overall testosterone is 547 ng/dl. In the part of Russia that is in Europe, testosterone is 483 ng/dl. In the part of Russia that is in Asia, testosterone is 587 ng/dl. The part of Russia that’s in the Caucasus is 616 ng/dl. These numbers are weighted averages to reflect the very different population numbers for each datapoint we are using.

Note that here we refer to Russia east of the Urals as “Russia in Asia” but elsewhere we have refered to Russia east of the Urals as “Siberia,” since that is what most people in the Western world know it as. What we have elsewhere called “Siberia” is actually the Urals federal district, Siberia federal district, and the Russian Far East district combined. However in the text right below we are talking about Russian federal districts, so in this cause we use Siberia only to mean the Siberia federal district. 

Testosterone levels across Russia and the surrounding area

Testosterone in Siberian District
  • Novosibirsk – 537
Testosterone in the Ural District
  • Kurgan – 754
  • Uchaly – 621
  • Yamalo-Nenets Autonomous Okrug – 494
Testosterone in the Russian Far East district
  • Chita – 905
  • Yakutsk – 719
  • Khabarovsk – 664
  • Vladivostok – 516
  • Mirny – 476

Testosterone in the North Caucasus District
  • Stavropol – 717
Testosterone in the Southern District
  • Rostov – 580
  • Republic of Adygea – 363
Testosterone in the Northwestern district
  • Murmansk – 593
  • Petrozavodsk – 506
  • Nelmin-Nos, Nenets Autonomous Okrug – 501
  • Nes, Nenets Autonomous Okrug – 470
  • Vologda – 454
  • Arkhangelsk – 432
  • Vologda – 560 (this was before 2008, so it’s not on the contour plot or the Russia map)

Testosterone in the Central district
  • Moscow – 482 (the average of four datapoints: 502, 560, 360, 507)

How did I generate the averages?

If you want to check how I generated the averages for Russia using population data, you can check my work in this text file here.

Why are some Russian places low testosterone but others high?

In 1978, young Russians in Moscow had 747 ng/dl testosterone, which is pretty good. But now testosterone in Moscow seems to not be as high. Meanwhile, the vast area of Russia east of the Ural mountains is mostly high testosterone still, as is most of Russia in the Caucasus! I don’t understand what causes the different levels, but this question has been explored by Dr. Larissa Valerianovna Bets. I’ve linked to two of her papers here.

Testosterone in South America

South America averages 398.3 ng/dl

Argentina 455

Brazil 375 (average of the most recent data)

Testosterone levels in Brazil

We have data from hunter gatherer tribes in Brazil in the 80’s. There’s further discussion of this in our article Do Hunter-Gatherers Have High Testosterone?

Brazil today may have low testosterone due to its extensive use of pesticides. Some of the very low results on the chart are from pesticide-heavy places.

Chile 358

Peru 414 – see note.

Note: Peru is hard because the data just reflects how generationally elevation adapted the people are. Testosterone is greatly effected by elevation. You can get a high number in Lima by sampling people that haven’t lived at altitude for many generations, or you can get a low number by sampling someone who has lived at altitude for many generations. So the numbers I’ve collected here don’t really reflect anything location-specific in a meaningful way. Best I could do for Peru is to do an average of averages. For each city, I get the average for all the data I have from that city. That gives me a number for each city. Then I average the cities. Here’s the calculations:
Lima = (224+387+783+570+513)/5 = 495
Cerro de Pasco = (420+425+465)/3 = 437
Cusco = 558
Huancayo = 360
Puno = 220
(495+437+558+360+220)/5 = 414 ng/dl national average for Peru

Uruguay 404

Venezuela 384

Testosterone in South Asia

Average testosterone in South Asia: 477


Bangladesh 423

Bangladesh testosterone levels


India 487

Testosterone levels in each Indian city
  • 649 in Gangtok (before 2008, so it’s not on the contour plot)
  • 626 in Gujarat (before 2008, so it’s not on the contour plot)
  • 565 in Rohtak
  • 552 in Guwahati
  • 511 in Hyderabad
  • 475 in Bhopal and Pune (unable to place on the contour plot since I don’t have the data separately)
  • 450 in Kolkata
  • 371 in Kanpur

Pakistan 465


In Pakistan, the average male testosterone level is 465 ng/dl. Testosterone is 893 in Peshawar, 709 in Rawalpindi, 567 in South Punjab, 417 in Karachi, 369 in Jamshoro, 363 in Lahore.


Testosterone levels in each Pakistani area
  • 893 ng/dl in Peshawar
  • 709 in Rawalpindi
  • 613 in the Dir region of Khyber Pakhtunkhwa (average of three studies with very similar results)
  • 567 in “South Punjab” (this was the region name mentioned in the study)
  • 417 in Karachi
  • 369 in Jamshoro
  • 363 in Lahore
Testosterone levels in Southern Pakistan versus Northern Pakistan

Interestingly, testosterone levels are very high in Peshawar and Rawalpindi, which are both in the northern half of Pakistan. It seems that testosterone may have even risen in this area, as there was a 540 ng/dl testosterone result from Peshawar in 1990.

Unfortunately, in Karachi and Jamshoro, both in the southern part of Pakistan, testosterone levels seem to have dropped. Looking at one city, testosterone has dropped from a good high level of 740 ng/dl in Karachi in 1993, to 417 ng/dl in Karachi in 2010-2011.

Sri Lanka

Sri Lanka 533

Testosterone in Southeast Asia

Southeast Asia: 466 ng/dl average.

Indonesia 503

Malaysia 464Ethnic Malays (averaged 492 and 436)

Myanmar 481

Philippines 413

Thailand 433

Hmong farmers in northern Thailand apparently have very high testosterone.

Vietnam 503

Testosterone in Southern Europe

Average 482.7

Italy 480

Portugal 472

Spain 496

Testosterone in Subsaharan Africa

Cameroon 731

Testosterone levels in Cameroon
Note that the trendline doesn’t really mean anything here.

DR Congo 668 (averaging two quite different datapoints)

Ethiopia 671

Ghana 569

Kenya 552

Within the region of Kenya were the Turkana nomads, whose high testosterone levels we discuss in our article on hunter gatherer testosterone.

Nigeria 625

South Africa 472 (Black)

Uganda 586

Zambia – in 1972 in Lusaka, ethnic Africans were 520 ng/dl, ethnic “Asians” were 752 ng/dl (I don’t know who these were, I suspect they were Indians?), and ethnic Europeans were 782 ng/dl. The age of all these people is not known to us.

In a seperate study in Zambia in 1972, a population whose ethnicity was unstated and whose age was 18-34 had testosterone of 660 ng/dl, which we age corrected to 555.

Testosterone levels in Turkey

Turkey’s testosterone is 420 ng/dl.

Testosterone in Western Europe

(Not counting Britain and Ireland, which are under “Anglosphere,” and not counting Northern Europe)

Belgium 561

Testosterone levels in Belgium

France 420

Germany 434

The Netherlands 571 (data mostly from early-mid 2000’s – however the most recent data is actually somewhat higher as you can see)

Testosterone in New Caledonia, an island in the South Pacific

New Caledonia: 562 ng/dl (Melanesian), 568 ng/dl (White)

Occupational/behavioral effects:

  • In Northern Pakistan, secular students are very high, madrassa students aren’t quite as high (still high by modern standards though)
  • Wildland firefighters in Montana – allegedly 1200 ng/dl (very high) (Source)
  • Russian police – quite high
  • Kazakh firefighters – very LOW (there is something wrong in Kazakhstan as noted elsewhere – some kind of endocrine disruption)
  • In the late 80’s in the US – 14% of low education & income (“low SES”) men were in the upper 10% of testosterone, while only 6% of high SES men were in the upper 10%. (Source)

Antisocial behavior, Income, Education, and Testosterone

High testosterone produced more “antisocial behavior” in both low SES and high SES men, but this effect was much weaker in high SES men. For example, a low SES man with high testosterone was about twice as likely to engage in “adult delinquency” than a low SES man with normal testosterone. But a high SES man with high testosterone was actually a little bit less likely to engage in “adult delinquency” than a high SES man with normal testosterone. High SES men in general were far less likely to engage in “adult delinquency.”

Excellent quotes from this article to explain that:

“Testosterone is related to a general sensation-seeking tendency… [low SES men] often find the most exciting things to do are illegal, while high SES individuals can do things that are both exciting and socially acceptable – driving fast cars instead of stealing them, arguing instead of fighting, playing college football instead of assaulting.”

Another quote from the article:

“Testosterone in adolescent males has been associated with dominance, leading especially to delinquency when they feel unfairly restricted or prematurely try to engage in activities… usually reserved for older persons” – I would suggest that our culture encourages the treatment of young adult males more like children than nature and the past would suggest is a good idea. School (and current typical jobs) reduce sense of agency – the male rebels against it. If he feels that he succeeds in rebellion, his test stays naturally high, if he feels he has been defeated, that is called “chronic social defeat” and animal studies say that produces unfavorable chemical changes, depression, etc.

(Source of quotes)

Years of education consistently lowers testosterone a bit on average – at least in the first world.

In the late 80’s USA, among young whites:

  • 11 years education – ~735 ng/dl.
  • 16 years of education – ~665 ng/dl

Among older whites:

  • 11 years education – 662 ng/dl.
  • 16 years education – 615 ng/dl


Social and Occupational Stresses

90’s USA medical doctor residents (80 hour weeks and low sleep generally) – test is crashed to the 300’s (other workers at the hospital were almost double, at that time)

One study found that ethnic Indians in India had high test, but ethnic Indians in England had low test. (Immigrant stress effect? Effects of the climate? Change in diet? Change in lifestyle?) Also note that ethnicity is not the determining factor for hormone levels.

Mice study: Chronic social defeat during adolescence causes higher stress hormones in later life (lowers test) (source)

Modern high school (and work) would likely be experienced as “chronic social defeat” by a typical male. He’s forced to be there and experiences his own failure to stop that. I’d expect any loss of agency to produce sweeping chemical-behavioral changes. (low agency correlated strongly with depression)

Miscellaneous claims about testosterone – debunking time!

So there’s a lot of claims that fly around about test

Urban vs rural? UNKNOWN. (Aside from South Africa where people living in the rural areas had less cortisol and more testosterone than when they “urbanized” which meant moving into a favela-like place. Unclear how this translates to urban/rural splits in the rest of the world.

Regional variation in the USA? (Claims: the midwest and rockies are higher, the coasts and especially california are low) Results are mixed – the midwest is LOW LOW. Portland for some reason is good, and Florida and Alabama have ok levels. US locations correlate pretty well with pesticides. Hypothesis is that heavy crop areas will have lower test and this checks out so far.

Testosterone levels across the USA map

Ethnic variation – very unclear, for any ethnicity you care to name there are regions where they have high test and regions where they have low test.

The claim that certain special locations are higher – Specifically East Euro and Baltic are claimed to be high – this is FALSE – these areas are LOWER. However Siberia and middle east are high, except for the low test small Persian Gulf countries.

The claim that the 3rd world is higher – FALSE – Latin America is mostly very low. And parts of the 1st world are actually OK.

Many of the claims out there are based on saliva tests and on pretty minor increases or decreases. Saliva tests are debatable, and our project didn’t mix data from them into our results, which are based on blood tests.

More claims:

  • special diets will raise test (red meat, high Sat Fat, low carb, low PUFA, raw eggs/cholesterol) – Mixed results.
  • special micronutrients will raise test (zinc) – Kind of
  • blue collar is higher than white collar – unclear, but more education does correlate with slightly lower testosterone.
  • low class higher than middle and upper class – unclear
  • primitives are higher than “civilized” – mostly TRUE (exceptions: San, and malnourished)
  • test was far higher in the past – actually appears to be true
  • ultra high levels were found in the past or in tribes – I was very ready to debunk this but there really are insanely high outliers that aren’t uncommon in “primitive” groups. Maybe 5% of the sample has like 1800+ test in some groups. Levels that would flag a steroid test. There’s more info on this in our article: Testosterone Levels 100 Years Ago
  • working out will raise your test – very questionable.
  • boot camp will raise your test – mixed.
  • combat sports will raise test – maybe psychologically but these athletes can be not high test (TBI’s, excess cardio)
  • combat will raise test – minor effect.
  • cold exposure raises test – mixed. There’s a tendency for warm weather to raise test. One exception – researchers from India had their test go up quite a bit while spending a year in Antarctica. But there are a lot of confounding factors here. Another study found workers who were in consistently freezing conditions to have low test. However, some of the coldest places on earth (Siberia) have very high test pretty consistently.
  • sun/light exposure raises test – mixed
  • altitude raises test – for some reason this helps a bit but very high altitude is very bad for test. People transported to about 10k ft had a small to moderate increase in test, however, mountain villagers who live even higher than that in Central Asia have very low test, while their neighbors at lower altitude have higher test. (source)
  • test moves with time of year – minor effect, test seems to be just a bit higher in the early fall and a bit lower in the late winter,  broadly speaking – an effect of warmth and sun over the months seems possible. More info on that in our article: Does Testosterone vary through the year?
  • I want to steer you away from minor stuff like – COLD SHOWERS, raw eggs, working out in a SPECIAL test-raising way!!!
  • computer, smartphone lowers test – from psychological effect, and from emf – unknown in humans, but a few studies have found emf lowers test in rodents.

Why is testosterone so low in some places?

Sadly, testosterone appears to be low to the point of being unhealthy in much of the world. The studies suggest that testosterone used to be pretty high all over the world before the 80’s. Testosterone has fallen in these places, while staying high in the other places. More info here, showing the changes in testosterone over time in all the countries and regions where data was available: Testosterone Levels 100 Years Ago

The trends in worldwide testosterone levels by region
Click for full size

Here’s testosterone levels around 1980 (data was from between 1975 and 1985) – data may be a bit incorrect as of 10/26/23:

Testosterone levels in 1980 around the world

We have found that low testosterone correlates with PUFA consumption in the diet (seed oils are a big source of this), and low testosterone also correlates with agricultural chemical use by country.

Low testosterone might be from agricultural chemicals getting into your body

Agricultural chemicals get into the food and water. More info here: Pesticides May Lower Testosterone

This data is somewhat out of date and in error, but the overall trend wouldn’t be too effected.

You can lower the amount of chemicals you ingest by eating organic food, or food raised by a farmer that you know doesn’t use chemicals. A big source of these chemicals in your body is the water you drink. Agricultural chemicals run off fields and end up in your water supply. A good water filter can remove testosterone-lowering chemicals and make a big difference for you.

Testosterone could be lowered by chemicals and synthetic underwear

There are lots of chemicals and microplastics floating around that are known to be endocrine disruptors – foreign substances that mess with your body’s hormones. Major sources of these chemicals: Plastic food packaging, cosmetics, detergents, and synthetic clothes, like polyester underwear. Hunter-gatherers aren’t exposed to these artificial chemicals, and they usually have very high testosterone, around 900 ng/dl compared to our typical 400 ng/dl. (Source)

Polyester and other synthetic fabric in clothes and furniture is a major source of microplastic absorption into the body, because synthetic fabrics shed plastic dust that we then breathe in. Microplastics are frequently xenoestrogens – foreign substances that cause estrogenic effects in the body, and therefore will typically lower testosterone.

Your underwear likely has synthetic plastic – polyester -in the fabric. It’s better to wear underwear made of natural fabric, like cotton or wool, as some studies show that synthetic underwear could reduce sperm count by a lot. (source below)

A lot of underwear that claims to be 100% cotton or wool is actually a blend of a synthetic fabric, like polyester, with wool or cotton. We can save you the trouble of looking for real wool underwear though – here are some 100% merino wool boxers made by Woolly brand:

And here are 100% cotton boxers from Jockey:

Go ahead and check the label on your underwear – it is likely a blend with polyester, not actually 100% cotton.

As mentioned, some studies done on rats and dogs have found that polyester underwear (yes, worn by animals!) drops sperm count to low levels compared to sperm count in an animal wearing underwear made of natural fabric. (Source) In that study, testosterone wasn’t shown to be effected, but the damage mechanism of polyester to sperm count that was identified in that study (electric disruption of the body) could conceivably come into play for damaging hormone production as well.

Seed oils might lower testosterone

You can avoid seed oils and PUFA by eating a diet where the fat comes from butter, coconut oil, and beef tallow, rather than from canola oil, soybean oil, fast food, and manufactured food. More info here: PUFA Might Lower Testosterone

This data is somewhat out of date and in error, but the overall trend wouldn’t be too effected.

The data in text form, age adjusted, testosterone levels

DR Congo668
Saudi Arabia599
The Netherlands571
French West Indies562
Sri Lanka533
South Africa472
South Korea462
New Zealand428

Important note: There are many countries I have no data from, or no usable data from. Very possibly these countries might have higher (or lower) testosterone than countries on this list.

12 Replies to “What Country Has The Highest Testosterone?”

  1. Do you believe that a decrease in testosterone production or delayed puberty in children aged 5-10 who swim in chlorinated public waters could be a significant factor in the overall decline of testosterone levels in Western countries?

    1. I don’t know enough about it to comment too much. I’ve seen this study about it: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3229674/

      If I understand correctly, it says that indoor pools are a problem, but outdoor pools aren’t, I imagine because of the chlorine fumes in the air. Looks like ~500 ng/dl in those who never swam in indoor pools and ~435 ng/dl in those who swam indoors a lot.

      My guess is that much of the testosterone decline is prenatal in origin. That being said, it’s probably possible to fix the damage and get your biology back to what it’s supposed to be.

  2. Hello!

    I’m interesting in the results of the carpathian basin (North-West Transylvania) with 394ng/dl. Where do you have this results?

    Thank you in advance and best regards!


    1. That is the testosterone levels of the control group of a study done in Oradea, Romania, from around 2019. The raw data for the control group was 405.75 ng/dl at a mean age of 46.72, and we age corrected it to 394 ng/dl. (We age correct all the data like this to represent a theoretical whole population in order to make the data comparable across the world.)

      This control group was those without metabolic syndrome. Those with metabolic syndrome were even lower at 338.97 ng/dl at age 47.88. (That’s not surprising – metabolic syndrome destroys testosterone levels)

      Here’s the source study: https://www.rjdnmd.org/index.php/RJDNMD/article/view/603/474
      Goel, Prashant, and Amorin Popa. 2019. “LOW TOTAL TESTOSTERONE-COMPONENT OF METABOLIC SYNDROME”. Romanian Journal of Diabetes Nutrition and Metabolic Diseases 26 (2), 145-48.

      We found two other recent studies from Romania with similar results, but we didn’t use either of them because they were unclear one way or another. They didn’t have enough data for us to know if they were representative of the whole population, and didn’t have enough data to let us age correct them either. However they are useful because they show similar results (data in the low 400’s ng/dl) to the first study, so we know that first study is probably not an aberration.
      https://web.archive.org/web/20220303132016/doiserbia.nb.rs/img/doi/0354-4664/2015/0354-46641400035C.pdf (although this study seems to be from Iasi, Romania, on the other side of Romania from Oradea)
      https://onlinelibrary.wiley.com/doi/abs/10.1111/crj.12150 (unclear where in Romania this study was)

      I don’t know why this area has lower testosterone. I’m not familiar with the area unfortunately. Maybe it is exposed to pesticides? We’ve found that pesticide exposed regions often have low testosterone. Do you have any ideas what may be causing it?

      Unfortunately I couldn’t find any data from Romania from earlier times to see if testosterone has always been this low, but it’s very likely that testosterone was much higher in the past. Just about everywhere in the world that is low testosterone now used to have much higher testosterone in the past.

      Hope this helps!

  3. Great research it was very entertaining to read through and see. but it was unfair that you didn’t uncover latin America in depth, only a few regions here and there, we can’t have a thourough idea like that. i am so interested in that continent culturally and geographically etc, i wish you could update this research and make it more encompassing of all the regions of the world.

  4. I left a comment i don’t know where it went? did it get deleted ( oh my apologies, the comment is still there, i am just so excited and enthusiastic about this wonderful project that’s all)

  5. Казахстан из за ядерных испытаний уменьшился уровень тестостерона в 3 раза, с 1300 – 356нм. За короткое 40 лет казахи с 1 места упали на самый низ. Думаю у них природа наладится

  6. It’s odd to see the Tzcech people last because the only study known is

    Hormonal homeostasis in a group of 216 aging Czech males and correlation with responses to a questionnaire of the University of St Louis

    Results were taken from Czech males 40-80 and found well above control average. Believe the mean was around 650-700

    This should reflect in your data for the Eastern European area.

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