Does obesity lower male testosterone levels?
Results of a study published online ahead of print in the journal Diabetes Care, conducted by University at Buffalo endocrinologists, showed that 40 percent of obese participants involved in the Hypogonadism in Males (HIM) study had lower-than-normal testosterone readings.
The percentage rose to 50 percent among obese men with diabetes. Results also revealed that as body mass index (BMI) — a relationship of weight–to-height — increased, testosterone levels fell.
“The effect of diabetes on lowering testosterone levels was similar to that of a weight gain of approximately 20 pounds,” says Sandeep Dhindsa, MD, an endocrinology specialist in the UB Department of Medicine and first author on the study.
Correlation is not causation, but if there is actually a causal relation here, then something like this can affect the psychology and behavior of a male.