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Prolactin is a hormone that you generally want to keep low rather than high.

Prolactin levels in men correspond to their estrogen levels.

Both estrogen and prolactin are very inflammatory.

Worse, they both tend to lower sexual drive and performance in men.

So, today we are going to look at a study showing the effects of long-term levels of prolactin and testosterone in men.

As men age, their testosterone levels fall, but their prolactin levels rise.

This chart from an earlier, but excellent study shows how men’s levels rise.

In fact, our more recent study shows prolactin levels rise 5.3% per year in older men.

Prolactin comes mostly from the pituitary, located in the brain.

But the prostate also makes prolactin.

And rising prolactin levels are a bad indicator of potential prostate cancer.

As the researchers note:

Recent reports suggest local, glandular production of PRL by the prostate and a possible indirect role for prolactin in prostate cancer.

Age and cancer are not the only things that cause prolactin levels to increase.

Stress powerfully raises prolactin, too.

In this experiment, researchers studied parachute jumpers, both inexperienced and experienced.

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They found prolactin levels shoot up with the stress of jumping out of an airplane.

And they found that it applies just as much to the experienced as to the inexperienced jumpers.

The authors conclude that acute stress increases prolactin and cortisol levels, as well as thyroid-related TSH.

In another experiment, these researchers went swimming in cold water.

The researchers were experienced swimmers but not acclimated to swimming in really cold water.

They found that over time the stress of the cold water swimming DOUBLED their prolactin levels.

Continued training in cold water had a result that was surprising:

Basal prolactin levels DOUBLED!!

With levels that high, it is a good bet that their libido and sexual performance declined as well.

So this tells us that men need to manage their prolactin levels.

If you have higher prolactin levels, you need to work on lowering them.

Anything that lowers estrogen levels will also lower prolactin levels.

There are supplements that lower estrogen and prolactin.

Vitamin E, androsterone, pregnenolone, progesterone, aspirin, and methylene blue are some of the supplements you can take.

Lowering stress, getting plenty of sugar, and bag breathing are great ways to lower prolactin levels.

You do need some prolactin.

But the problem for most aging men is going to be too much prolactin.

And this applies to many young men as well.

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Matt Cook is editor-in-chief of Daily Medical Discoveries. Matt has been a full time health researcher for 26 years. ABC News interviewed Matt on sexual health issues not long ago. Matt is widely quoted on over 1,000,000 websites. He has over 300,000 daily newsletter readers. Daily Medical Discoveries finds hidden, buried or ignored medical studies through the lens of 100 years of proven science. Matt heads up the editorial team of scientists and health researchers. Each discovery is based upon primary studies from peer reviewed science sources following the Daily Medical Discoveries 7 Step Process to ensure accuracy.