Probiotics and Testosterone: The Benefits of Bacteria on Testicle Size & Sperm Count

Let’s talk about probiotics and testosterone.

There are around 100 trillion bacterial cells making up the human body.

To give you a reference of just how significant that is, remember that there are not even 100 trillion stars in our galaxy and there are only 10 trillion actual “human” cells harbored in the body. (1)

So needless to say bacteria are a huge part of your makeup, and maintaining healthy bacteria is a vital part of maintaining overall health.

This includes immense benefits to your testosterone levels.

But first, let’s weed out some of the bullshit involving probiotics because there is a lot out there.

The word probiotic is a derivation of two Greek words. The “pro” portion signifying promotion and the “biotic” portion meaning life. (2)

That’s a pretty broad meaning if you ask me, and to make it worse, the USDA defines a probiotic as “any viable microbial dietary supplement that beneficially affects the host.”

So the food industry is latching on to the relatively recent spike of interest in probiotics and using the broad definition to push out products that fall under the definition, pushing to the back some of the products out there that are really REALLY good for you.

What good probiotics actually do is promote the health of good bacteria in your body.

Some really probiotic rich foods are, plain unflavored yogurt, kefir, sauerkraut, miso, pickles, tempeh, kimchi, and kombucha.

What can these probiotics do for you?

Probiotics have a lot of benefits that don’t involve testosterone and those include:


Digestive Health

Probiotics can do wonders for digestive health. This is because there are around 1000 different types of bacteria lining your digestive tracts, helping you process and digest food. (2)

Probiotics help you build up the concentration of good digestive bacteria so you don’t have problems processing your food.

Ever wonder why you get diarrhea when you take antibiotics?

This is because in order to kill all of the bad bacteria circulating through you, some of the good bacteria are also sacrificed. Until the good bacteria builds back up, your body will be flushing out bad bacteria and have more problems processing food.

People that frequently take antibiotics or went through a destructive digestion illness like food poisoning may experience symptoms of lactose intolerance because there are no longer enough good bacteria lining the digestive tract to process dairy.

In this way, probiotics can actually cure lactose intolerance for some.

Either way, if you find you have less than optimal ability to digest some foods, probiotics can help rebuild that good bacteria.


Urinary Health

This is mostly a problem for women, but urinary tract infections can plague both genders.

Probiotics can prevent bad bacteria from entering the urinary tract. (2)

Not only that, but when being treated for a UTI with only antibiotics, 30-40 percent of the infections will return according to the University of Maryland.

Taking probiotics along with the antibiotics can help prevent the UTI from returning.



No you are not invincible, but taking probiotics can prevent you from getting sick.

The good bacteria can help build up your immune system by helping you maintain strong intestinal flora. (2)

Ingest probiotics to keep you from getting sick!


Related Reading on

  1. Science Reveals The Link Between Probiotics and Testosterone
  2. How To Get Rid Of Acne
  3. The Testosterone Grocery List



Obese people have different gut flora than normal-weighted people.

While this is an unsure part of the scientific community, it is believed that gut bacteria plays a role in overall weight and may play a role in ability to lose weight. (2)

At the very least, it has been found that maintaining health gut bacteria helps the obese keep weight off when they decide to lose weight.

So now that you know the benefits of probiotics on your general health, what do these benefits have to do with testosterone?

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This is my recommended probiotic of choice →


Probiotics Lower Cortisol

Cortisol is the principle stress hormone produced in the body.

If you read Testshock often, then you know that cortisol is the enemy of testosterone and that maintaining a healthy testosterone to cortisol ratio is vital for your health.

According to this study conducted on mice (good indicators of human interaction), probiotics can significantly decrease the stress hormone.

The study took two groups of mice, one was fed the probiotic lactobacillus ramnosis often found in yogurt with their diets and the other stayed on the regular diet of mouse feed.

After a few weeks, researchers threw all the mice into water bowls (yikes) to see their reactions to stress.

The group on regular mouse feed acted as expected and freaked out, swimming furiously to stay above water. After four minutes they got tired and accepted their drowning fates.

What was not expected was that, when the researchers threw the probiotic mice into the water, they were much less stressed and swam much more efficiently than the non-probiotic mice.

Researches saved the mice from drowning as they continued to swim past 6 minutes never accepting drowning.

Results also showed that the cortisol levels in the regular mouse feed group were 100 times higher than the probiotic group.

After the study was over, researchers found that the mice in the probiotic group had heightened levels of GABA in their CNS, which is what allowed them to be calm when they should have been panicking. (1)

Long story short, probiotics were found to significantly lower stress, which in humans would help natural production of testosterone.


Probiotics Increase Testicle Size and Testosterone Levels Directly

How to increase testicle size?

Other than simply lower cortisol to produce testosterone, probiotics actually have more direct effects on the male reproductive system. (1)

Lactobacillus reuteri and testosterone: In this recent study, rats were tested when given the probiotic Lactobacillus reuteri vs. a control.

Results of the study showed amazing results due to this probiotic being added to the rat feed.

In every single case of the Lactobacillus reuteri group, the rats saw prevented age related testicular shrinkage, increased testicular size and weight, increased testosterone levels, increased social domination, increased sperm motility and quantity, and increased LH levels.

Basically these rats were turning into extremely healthy males in terms of reproduction.

If you want to have more probiotics in your life (which you do) then you should add all the foods listed above to your diet.

If you are wondering if some other foods you are currently eating contain probiotics, you can rest assured that most fermented and organic foods have living and extremely active good bacteria.

Not only do probiotics have direct effects on testosterone and testicular size, they also increase general health.

Being health and having a healthy endocrine system will no doubt boost testosterone production as well.

If you are interested in how to naturally increase your testosterone levels (which you should be, don’t mess with that synthetic crap), then you need to check out the Testshock program, which describes in detail the tactics (training, diet, lifestyle) you must implement to optimize natural testosterone production.


Works Cited

  1. Kuoppala, Ali. “Get Big Testicles and More Testosterone With Probiotics.” Anabolic Men. N.p., 15 May 2014. Web. 21 Aug. 2015.
  2. Food Matters. “6 Healing Benefits Of Probiotics.” Food Matters. N.p., 17 May 2012. Web. 21 Aug. 2015.


Christopher Walker

1 Comment

  1. alan campbell on June 27, 2017 at 1:48 pm

    I am 72 and my T is bottomed out I notice my muscle mass has dropped and my fat mass is the same I have been declining to this point at a faster rate these last 5 years I need a comprehensive plan to at least raise my T up so my exercising will help me lose weight.

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