Plant Protein Linked to Higher Testosterone in New Study
Researchers found that dietary protein sources correlate with varying hormone levels in middle-aged men.
Updated on Oct. 28, 2026 in Men’s Health
Live Poll
Do you believe your current diet significantly influences your long-term health and energy levels?
A study from the University of Eastern Finland reports that men with higher intake of plant protein show increased testosterone levels compared to those consuming more animal-based protein. The findings analyze data from over 2,500 participants.
Why it matters
Understanding how specific food groups influence hormonal balance can help individuals make informed dietary choices for long-term health. These results highlight the distinct physiological impacts of different protein sources on the male endocrine system.
The study analyzed 2,546 men aged 42 to 60, finding that high animal protein intake correlates with a 1.2 nmol/l lower testosterone level than the lowest intake group. Conversely, plant protein intake was associated with a 1.1 nmol/l increase in testosterone.
The players
University of Eastern Finland
This is a public research university that conducts comprehensive studies on public health and nutrition.
International Journal of Food Sciences and Nutrition
This is a peer-reviewed scientific publication that covers advances in food science and nutritional research.
The details
Researchers assessed dietary habits using four-day food records and measured blood concentrations of total testosterone and sex hormone-binding globulin. The data revealed that while meat consumption impacts SHBG concentrations, dairy protein specifically correlates with lower levels of both total testosterone and SHBG.
Timeline
Dietary intake assessments were conducted between 1984 and 1989.
The study findings were published on October 28, 2026.
The Big Picture
This study extends the University of Eastern Finland's nutritional epidemiology research by examining the intersection of macronutrient sources and endocrine health. It adds to a growing body of evidence exploring how long-term dietary patterns influence hormonal markers.
These findings suggest that men may consider diversifying their protein intake to include more plant-based options to potentially support healthy hormone levels. Consulting with a healthcare provider remains the best way to interpret these results in the context of personal wellness.
The takeaway
Dietary choices involving protein sources may play a more significant role in endocrine health than previously emphasized. Readers can benefit from prioritizing a variety of plant-based proteins to complement their existing nutritional plans.
Further reading
For more on hormonal health trends, visit the Men’s Health section.
More information
Review the study published in international journal for the full methodological details and data analysis.
Live Poll
Do you believe your current diet significantly influences your long-term health and energy levels?
