The Study
Effects of Minimally Processed Red Meat within a Plant-Forward Diet on Biomarkers of Physical and Cognitive Aging: A Randomized Controlled Crossover Feeding Trial
This study gave people two different diets for a few weeks and measured things like blood sugar and brain chemicals to see what changed. It shows that eating pork in a healthy way didn't make things worse—and might have helped a little—but it didn't test if people felt smarter or remembered better.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Scientists gave older adults two different diets for 8 weeks each: one with lean pork and one with lentils, both healthy and plant-focused. They checked how their bodies responded.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 578 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1The changes in cholesterol and insulin are meaningful for heart and brain health.
- 2The homocysteine rise only happened in a small group with low B12 — it’s not a problem for most.
- 3Both diets lowered bad cholesterol and insulin.
- 4Pork raised good cholesterol (HDL) by 3.5 mg/dL and improved insulin sensitivity.
- 5Both diets boosted brain-friendly chemicals like GABA and tryptophan.
- 6Muscle strength stayed the same.
- 7But in 6 people with high homocysteine, pork made it worse.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Current Developments in Nutrition
Year
2025
Authors
Saba Vaezi, Bruna O. de Vargas, Lee Weidauer, Jessica L. Freeling, Moul Dey
Related Content
Claims (7)
People who eat meat have health outcomes that are neither worse nor better than those who eat less meat, after accounting for differences in income, education, and daily habits.
In adults aged 65 and older, eating 162 grams of minimally processed pork or 332 grams of lentils daily for 8 weeks within a plant-forward diet raises blood levels of GABA, tryptophan, phenylalanine, and glycine.
In adults aged 65 and older, eating 162 grams of minimally processed lean pork daily within a plant-forward diet for 8 weeks is associated with a modest improvement in insulin sensitivity compared to eating an isocaloric diet based on lentils.
In adults aged 65 and older, eating 162 grams of minimally processed lean pork daily for 8 weeks while following a plant-forward diet leads to higher HDL cholesterol levels than eating an isocaloric lentil-based diet, with a mean difference of 3.5 mg/dL.
In adults aged 65 and older, eating either 162 grams of minimally processed pork or 332 grams of lentils daily as part of a plant-forward diet lowers fasting insulin and total cholesterol levels compared to a typical omnivorous diet.
In adults over 65, eating 162 grams of minimally processed pork daily for 8 weeks while following a plant-forward diet increases homocysteine levels in those who already have high levels, reflecting a relationship between red meat consumption and metabolic differences in one-carbon metabolism.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.