A study found that a BMI of over 30 was associated with a nearly nine times higher risk of having low testosterone.

Betaine, also known as TMG, is a supplement that has good evidence for boosting testosterone and athletic performance.

Before considering testosterone therapy, one should first address root causes like obesity and chronic illness and implement resistance exercise.

Despite positive headlines, the new Transverse Trial's data allows for the possibility that testosterone therapy could increase heart problems by as much as 17%.

The recent Transverse Trial on testosterone safety is controversial because 62% of participants in the treatment group stopped the therapy before the study was over.

The most common adverse effect of testosterone therapy is an increase in red blood cells, a condition called eryrocytosis, which can lead to higher blood pressure.

Clinical guidelines recommend testosterone therapy only for men with clinically low levels and accompanying symptoms, not for normal age-related decline.