09/22/2025 / By S.D. Wells
A six-week trial by University of Helsinki researchers suggests that men can lose weight and improve cholesterol without cutting calories—simply by replacing much of their meat intake with legumes. Dubbed the “BeanMan” study, the research followed 102 healthy men, ages 21–61, to see how swapping red and processed meat for beans, peas, and plant-based options affected health.
Participants were divided into two groups with equal protein intake. One group ate about 760 grams of red and processed meat weekly, while the other reduced meat to just 200 grams, replacing the difference with legume-based foods such as bean patties, pea soup, and plant-based meat strips. Importantly, the legume group still ate some meat, aligning with the upper limits of the Planetary Health Diet’s recommendations.
Legumes offered several nutritional shifts: higher fiber, lower saturated fat, and more polyunsaturated fats. Fiber slows digestion, regulates appetite, and can increase the calories burned during digestion. Together, these qualities likely contributed to how energy was stored and metabolized during the trial.
Surprisingly, the legume group ate about 240 calories more per day than the meat group but still lost more weight. On average, they dropped 1 kilogram (2.2 pounds), compared to just 0.3 kilograms (0.6 pounds) in the meat group. They also showed reductions in waist circumference, a marker of abdominal fat, while the meat group’s waist-to-hip ratio actually increased.
Both groups lost some lean mass and fat overall, but within-group differences suggested legume eaters saw more favorable changes. However, researchers cautioned that some of the weight difference might be explained by increased exercise among the legume group, since behavior changes often accompany dietary interventions.
The most striking health change was in cholesterol. After six weeks, men in the legume group had lower total and LDL (“bad”) cholesterol, while those in the meat group saw increases. HDL (“good” cholesterol) fell slightly in the legume group but remained stable in the meat group. These shifts occurred without calorie restriction or mandatory exercise, suggesting diet alone was influential.
Men in the legume group maintained high compliance, eating nearly all of the foods provided. Convenience items like frozen peas, ready-made soups, and plant-based patties made the switch more manageable than strict dieting.
Still, the trial revealed potential nutrient trade-offs. By week six, 16% of the legume group showed marginal vitamin B12 levels, and 14% had low iodine excretion. These deficiencies were partly present at baseline but highlight the need for supplementation or fortified foods in long-term meat-reduction diets. Iron intake, however, increased in the legume group due to beans and peas, though it came in the less absorbable non-heme form.
The study’s short duration and focus on health-conscious Finnish men limit broader conclusions. Since foods were provided, real-world challenges like shopping and cooking weren’t addressed. Still, the rapid cholesterol improvements and modest weight loss suggest that even partial substitutions of meat with legumes can yield measurable health benefits.
For men who consume large amounts of red and processed meat, the takeaway is clear: swapping in beans and peas—even while continuing to enjoy some meat—can support weight control, lower cholesterol, and improve overall health. Just don’t forget to watch for nutrient gaps if making the shift long-term. Tune your food news frequency to FoodSupply.news and get updates on more junk science food stuff that corporate America loads the grocery store shelves with to drive up chronic diseases like obesity, so Big Pharma can take your money.
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