Where you get your protein affects your testosterone: study

Key Points:

• A Finnish study involving 2,546 men aged 42 to 60 found that higher consumption of animal protein was associated with lower testosterone and sex hormone-binding globulin (SHBG) levels, while higher intake of plant-based protein correlated with increased testosterone.
• Men who ate the most animal protein had about an 8% lower testosterone level compared to those who consumed the least, whereas those with the highest plant protein intake had roughly a 7% higher testosterone level.
• The study suggests plant proteins may reduce inflammation, which is linked to higher testosterone secretion, while diets high in animal protein were associated with higher BMI, smoking, alcohol consumption, and diabetes.
• Plant-based protein sources such as legumes, nuts, seeds, and whole grains provide protein along with fiber and antioxidants, whereas animal proteins, especially red and processed meats, contain unhealthy saturated fats linked to heart disease, stroke, and cancer.
• These findings indicate that men concerned about testosterone levels might benefit from shifting towards more plant-based proteins and reducing animal protein intake.