Finnish Study Links Plant-Based Protein Intake to Higher Testosterone Levels

OPA WIRE, Oct 30 (OPA) — A study of 2,546 men aged 42 to 60 has identified a potential link between protein sources and male hormone levels. Researchers found that participants with the highest intake of plant-based proteins exhibited higher total testosterone concentrations than those who consumed the least. Conversely, men with the highest consumption of animal protein showed lower testosterone levels, according to data analyzed by the University of Eastern Finland.

Specific findings indicate that men in the highest animal-protein intake group had average total testosterone concentrations 1.2 nanomoles per litre lower than those in the lowest-intake group. In contrast, those with the highest plant-protein intake recorded concentrations 1.1 nanomoles per litre higher. The study also noted that dairy-protein intake was associated with lower total testosterone and sex hormone-binding globulin concentrations, while meat-protein intake correlated with lower sex hormone-binding globulin but not total testosterone.

The research utilized dietary data recorded over four days between 1984 and 1989, adjusted for variables including age, body mass index, and lifestyle factors. The study focused on men residing in eastern Finland, measuring total testosterone and sex hormone-binding globulin, a protein that influences how testosterone circulates in the blood.

Researchers cautioned that the study is cross-sectional, meaning it identifies associations rather than establishing direct cause and effect. Miika Wynne-Ellis, a doctoral researcher at the University of Eastern Finland, noted that while the observed differences in testosterone concentrations were statistically significant, they remained relatively small. The findings do not confirm that dietary changes alone will significantly alter hormone levels in the general population.