A recent study has found a correlation between men’s dietary patterns and their testosterone levels, suggesting that higher consumption of meat and dairy products is linked to lower concentrations of the hormone. Conversely, men who consume greater amounts of plant-based proteins from vegetables, legumes, nuts, and seeds tend to have higher testosterone levels.

Testosterone plays a critical role in regulating sex drive, muscle mass, and energy levels. Levels of the hormone naturally decline by approximately 1 percent per year after age 30, with factors such as obesity and type 2 diabetes contributing to further reductions. The new research, conducted by a team from the University of Eastern Finland, analyzed dietary habits and hormone levels of 2,546 men aged 42 to 60.

Participants were categorized into four groups based on their intake of animal and plant proteins. Data revealed that men with the highest consumption of animal protein exhibited lower average testosterone concentrations compared to those with the lowest animal protein intake. In contrast, a higher intake of plant-based protein sources was associated with increased testosterone levels.

The study, published in the International Journal of Food Sciences and Nutrition, notes that one possible explanation for this relationship is that men consuming more plant proteins may maintain more healthful overall diets, which could positively affect hormone levels. The authors pointed out that “higher animal protein intake was associated with lower circulating testosterone,” although the exact mechanisms behind these associations remain to be clarified.

While the research highlights potential dietary influences on testosterone, the authors suggest further studies are needed to understand the complex interaction of diet, hormone levels, and overall health. This study adds to growing evidence that plant-based dietary patterns may offer benefits beyond traditional nutritional measures, particularly in middle-aged and older men.