Cannabis Users Had 23% Higher Testosterone Levels, New Study Finds

Key Takeaways

• A new Swiss study found that cannabis users had approximately 23% higher testosterone levels than non-users.
• Researchers analyzed dozens of hormones in young men and found no evidence that cannabis lowers testosterone.
• The findings challenge a belief that has existed for decades.
• The study does not prove that cannabis directly increases testosterone.
• Scientists say more research is needed to understand why the difference exists.

For years, cannabis consumers have heard the same warning: smoking weed lowers testosterone.

The idea has been repeated in news reports, health articles, and anti-drug campaigns for decades. But a new study from Switzerland is challenging that assumption and raising new questions about how cannabis affects the male body.

Researchers found that young men who used cannabis had approximately 23% higher testosterone levels than non-users. The findings have attracted international attention because they directly contradict one of the most common claims about cannabis and male hormones.

However, before anyone starts treating cannabis as a testosterone booster, it is important to understand what the study actually found—and what it did not.

What Did The Researchers Discover?

The study was conducted by scientists from the University of Geneva and the Swiss Center for Applied Human Toxicology.

Researchers examined 94 healthy young men aged 18 to 23. Half of the participants were cannabis users, while the other half reported no cannabis use.

Instead of focusing solely on testosterone, scientists performed a detailed analysis of numerous hormones involved in the body’s endocrine system. This allowed them to build a much broader picture of how cannabis use might be associated with hormone production.

The most surprising result was that cannabis users showed testosterone levels that were roughly 23% higher than those found in non-users.

The researchers also found evidence suggesting that the increased testosterone production originated in the testes, specifically in cells responsible for producing the hormone.

For many scientists, the findings were unexpected.

For many consumers, they were even more surprising.

Why This Challenges Conventional Wisdom

The belief that cannabis lowers testosterone can be traced back to studies published decades ago.

Some early research from the 1970s suggested that cannabis use might interfere with hormone production and reduce testosterone levels. These findings became widely accepted and were repeated so often that they eventually became common knowledge.

The problem is that many of those early studies involved small sample sizes, different testing methods, and cannabis products that differed significantly from what consumers use today.

Over the last decade, researchers have increasingly questioned whether the relationship between cannabis and testosterone is really that simple.

Several modern studies have failed to find meaningful reductions in testosterone among cannabis users. Some have even reported slightly higher levels among people who consume cannabis regularly.

The new Swiss study adds another piece to that growing body of evidence.

Does Cannabis Actually Increase Testosterone?

This is the question most readers will immediately ask.

The honest answer is that nobody knows yet.

The study found a clear association between cannabis use and higher testosterone levels, but it did not prove that cannabis directly caused the increase.

That distinction is extremely important.

Researchers offered several possible explanations.

One possibility is that cannabis may somehow influence testosterone production through biological mechanisms that scientists do not yet fully understand.

Another possibility is that the body responds to cannabis exposure by adjusting hormone production in unexpected ways.

A third explanation is perhaps the most interesting: men who naturally have higher testosterone levels may simply be more likely to use cannabis in the first place.

Testosterone has long been linked to sensation-seeking behavior, risk-taking, and novelty-seeking traits. It is possible that men with naturally higher testosterone are more likely to experiment with cannabis, rather than cannabis causing their testosterone to increase.

At this stage, the study cannot determine which explanation is correct.

What About Fertility?

Many people automatically assume that higher testosterone must mean better fertility.

Unfortunately, biology is rarely that straightforward.

The Swiss study measured hormone levels, but it did not examine sperm count, sperm quality, fertility rates, or reproductive outcomes.

As a result, the findings tell us nothing about whether cannabis users are more fertile or less fertile than non-users.

Previous research examining cannabis and fertility has produced mixed results. Some studies have reported negative effects on sperm parameters, while others have found little to no meaningful impact.

Because of these conflicting findings, experts caution against drawing broad conclusions about reproductive health based solely on testosterone levels.

In other words, higher testosterone does not automatically equal better fertility.

What This Means For Cannabis Consumers

The biggest takeaway from this study is not that cannabis boosts testosterone.

The real takeaway is that the relationship between cannabis and hormones appears to be far more complicated than many people previously believed.

For decades, the discussion was framed as if cannabis clearly lowered testosterone. This new research suggests the reality may be much more nuanced.

The findings challenge an old assumption and encourage scientists to take a closer look at how cannabinoids interact with the endocrine system.

For consumers, the study provides another reminder that many long-standing cannabis myths deserve re-examination as new evidence becomes available.

The Bottom Line

A new Swiss study found that young cannabis users had approximately 23% higher testosterone levels than non-users, challenging a belief that has existed for decades.

While the results are certainly intriguing, they do not prove that cannabis directly raises testosterone. Researchers still do not know whether cannabis influences hormone production or whether other factors explain the difference.

What the study does show is that the simplistic claim that cannabis automatically lowers testosterone may no longer hold up under modern scientific scrutiny.

As researchers continue to investigate the relationship between cannabis and hormones, one thing is becoming increasingly clear: the story is much more complicated than many people once thought.

You can read the full study here.