There is limited evidence on whether boxer briefs specifically affect testosterone levels. Testosterone is an important hormone that influences many aspects of health and development in men. Potential factors that can impact testosterone include:
- Genetics
- Age
- Body composition
- Certain medical conditions
- Stress
- Sleep
- Overall lifestyle
A few small studies have looked at the link between underwear choice and testosterone:
- One study in 2015 measured testosterone in men wearing boxer briefs, boxers, or more snug briefs. There were no differences in testosterone between the underwear groups. The study had limitations with a very small sample size.
- Another small 2012 study looked at scrotal temperature in different types of underwear. Higher scrotal temperature may negatively impact sperm health and testosterone production. Results showed tighter underwear choices like briefs increased temperature more than loose boxers. However, the study did not measure actual testosterone levels.
So there is very limited evidence that tighter underwear could potentially impact testosterone production by increasing scrotal temperature. However, well-designed studies specifically on boxer briefs and testosterone are lacking. There are also many other factors that can affect testosterone levels and regulation in men.
Given the limited evidence, experts do not recommend changing underwear choices solely to influence testosterone levels. Maintaining healthy lifestyle habits as a whole tends to be more important:
- Eating a nutritious diet
- Staying physically active
- Getting enough high quality sleep
- Managing stress levels
- Reaching and maintaining a healthy body weight
As always, it is best to speak to a doctor about any concerns with hormones, sexual health, or fertility. They can help interpret current evidence and provide personalized recommendations.