Caffeine and low T: Is there a connection?
Guys - Studies show a connection between high caffeine consumption and low testosterone, which may be due to how caffeine interacts with adenosine receptors that are found in both the brain and the testes. When caffeine blocks adenosine receptors in the brain, you may feel more awake, but when it blocks adenosine receptors in the testes, there’s a chance it may disrupt certain pathways that normally help produce testosterone.

I drink lots and lots of coffee, everyday.  I assume many do.  How is this not bigger news?  

https://nutritionj.biomedcentral.com/articles/10.1186/s12937-022-00783-z?lid=8tjorad7qtla

The association between caffeine intake and testosterone: NHANES 2013–2014 - Nutrition Journal

Caffeine and low T: Is there a connection? Guys - Studies show a connection between high caffeine consumption and low testosterone, which may be due to how caffeine interacts with adenosine receptors that are found in both the brain and the testes. When caffeine blocks adenosine receptors in the brain, you may feel more awake, but when it blocks adenosine receptors in the testes, there’s a chance it may disrupt certain pathways that normally help produce testosterone.  I drink lots and lots of coffee, everyday.  I assume many do.  How is this not bigger news?    https://nutritionj.biomedcentral.com/articles/10.1186/s12937-022-00783-z?lid=8tjorad7qtla

Todd Smith

Further, Caffeine increases stress: Testosterone isn’t the only hormone affected by caffeine; studies show caffeine also increases the stress hormone cortisol — although the effects may be reduced with daily caffeine consumption. High cortisol can increase your risk of heart disease and may suppress your testosterone production.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2257922/?lid=zwyeamslfopp

Further, Caffeine increases stress: Testosterone isn’t the only hormone affected by caffeine; studies show caffeine also increases the stress hormone cortisol — although the effects may be reduced with daily caffeine consumption. High cortisol can increase your risk of heart disease and may suppress your testosterone production.  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2257922/?lid=zwyeamslfopp

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☝️that makes sense - caffeine can hurt your testosterone levels and your overall health by wrecking your sleep and increasing stress. 

Here's @Alex 's second study:

Caffeine wrecks sleep: Studies show that caffeine reduces total sleep time by 45 minutes, sleep efficiency by 7%, and adds 9 minutes to sleep onset. Poor sleep has long been associated with low testosterone levels, but it also increases your risk of health conditions like diabetes, obesity, and cardiovascular disease.
 
https://www.uchicagomedicine.org/forefront/news/2011/may/sleep-loss-lowers-testosterone-in-healthy-young-men

Alex

Could this potentially be a knock on effect of too much coffee impacting sleep quality?

I don’t think any of us would be surprised if a study said lots of coffee impacts sleep quality, and if a second study found that poor sleep quality reduced testosterone

Could this potentially be a knock on effect of too much coffee impacting sleep quality?  I don’t think any of us would be surprised if a study said lots of coffee impacts sleep quality, and if a second study found that poor sleep quality reduced testosterone

☝️that makes sense - caffeine can hurt your testosterone levels and your overall health by wrecking your sleep and increasing stress.   Here's @Alex 's second study:  Caffeine wrecks sleep: Studies show that caffeine reduces total sleep time by 45 minutes, sleep efficiency by 7%, and adds 9 minutes to sleep onset. Poor sleep has long been associated with low testosterone levels, but it also increases your risk of health conditions like diabetes, obesity, and cardiovascular disease.   https://www.uchicagomedicine.org/forefront/news/2011/may/sleep-loss-lowers-testosterone-in-healthy-young-men

And a small study found that even high amounts of caffeine can increase testosterone, but only when consumed before exercise. 
https://pubmed.ncbi.nlm.nih.gov/18458357/

And a small study found that even high amounts of caffeine can increase testosterone, but only when consumed before exercise.  https://pubmed.ncbi.nlm.nih.gov/18458357/

Caffeine has some potential to benefit training outcomes via the anabolic effects of the increase in testosterone concentration, but this benefit might be counteracted by the opposing catabolic effect

Dose effect of caffeine on testosterone and cortisol responses to resistance exercise - PubMed

Bobby

i will defend my caffeine addiction as the same research shows that small amounts of caffeine may actually increase testosterone. Like with sperm, the negative effects on testosterone are only apparent with high caffeine consumption.