Coffee: Good Or Bad For Testosterone?


Coffee has been shunned by high performance athletes and body builders because they’ve believed it decreases testosterone.

But after the International Olympics Committee eased its ban on coffee a few years back, a New Zealand study showed quite the opposite.

Professional Rugby players given caffeine supplements an hour before lifting weights showed greater levels of testosterone after a power training session than team members who did the power training without caffeine.

Rugby Players Raised Testosterone

The results – published in the International Journal of Sport Nutrition and Exercise Metabolism in April 2008, found that power training without caffeine caused a rise in testosterone concentrations by 15 per cent, while power training with an 800-mg dose of caffeine led to a testosterone increase of 21 per cent. (1)

(Three 8 oz cups of coffee would give you a total of around out 250 mg of caffeine, so the Rugby players were getting three times that.)

A more recent  literature review of 29 studies showed without doubt caffeine improved athletic performance.

Women And Men React Differently

Interestingly, caffeine seems to affect women’s testosterone levels differently from how it affects men’s levels.

A 1996 study reported on Livestrong found that the women who drank the most caffeine-containing beverages — equivalent to more than two cups of coffee or four cans of caffeinated soda daily — had the lowest levels of testosterone.

While men’s bodies need a lot more testosterone and produce about 20 times the amount women do, the sex hormone is important for both sexes.

In men, it helps increase bone density, improve muscle mass and strength, assist in red blood cell production and play a role in sperm production and sex drive, while in women it plays an important part in sex drive.

Low T Correlates With Obesity

Men with low testosterone levels have been found to be more prone to be overweight and suffer from diabetes.

Liver Doctor reports previous research has also shown that elevated blood levels of insulin correlate with low testosterone.

Blood insulin levels rise if you eat sugar, flour, grains, cereals or starches (basically high carbohydrate foods).  You are also likely to have high insulin levels if you have a big waist; for men that means a waist greater than 37 inches (94 centimetres).

Two Or Three Cups No Harm


Now a new study published in Nutrition Journal tends to throw doubt again on how much coffee influences testosterone levels.
It found little or no difference in either men or women’s testosterone levels after taking coffee, though the study was small and was criticised for its lack of scientific rigour.
It seems you can drink two or three cups of coffee a day without worrying about lowering your testosterone levels, with one important proviso: don’t put sugar in it.

Sugar Devastates T Levels

Research presented at The Endocrine Society’s 91st Annual Meeting in Washington D.C found that sugar ingestion can cause a man’s testosterone level to drop by up to 25 percent
Interestingly the glucose solution lowered testosterone levels by up to 25 percent in all of the men regardless of whether they were diabetic, pre-diabetic or had normal blood sugar levels.

Because many men consume sugar all day long in sweets, pastries, and  soft drinks, they are probably suffering from artificially suppressed testosterone levels at the same time.

Testosterone levels naturally begin to fall once a man passes 50 years of age, but many younger men are suffering premature testosterone deficiency, which is affecting their quality of life.

How To Increase Testosterone Naturally

Some active steps you can take to improve testosterone levels:

  • Take a supplement like Herbal Ignite with herbs like tri ulus terrestris and hornmy goat weed – both considered to be beneficial for supporting and promoting healthy testosterone levels
  • Take a good fish oil supplement
  • Top up on magnesium; it helps improve blood vessel health and increase penile blood flow.

Ten Cups About Seven Too Many

As for that morning coffee?  As long as you take it without the sugar and doughnuts, two to three cups a day will do no harm. If you get up to 10 cups a day then consider it excessive.

High amounts of caffeine can lead to insomnia, accelerated heart rate, tremors and anxiety and can contribute to fibrocystic breast disease and menstrual disorders in women. If you are pregnant or have heart disease or stomach ulcers, you should reduce or avoid caffeine.

(1)   Int J Sport Nutr Exerc Metab. 2008 Apr;18(2):131-41.

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

Beaven CM1Hopkins WGHansen KTWood MRCronin JBLowe TE.


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