Study of 411 Greeks Links Weeks Without Meat or Dairy to Gene Shifts
Updated
Updated · ScienceAlert · Aug 14
Study of 411 Greeks Links Weeks Without Meat or Dairy to Gene Shifts
2 articles · Updated · ScienceAlert · Aug 14
Summary
A Nature Communications study tracked 200 Orthodox Christian fasters and 211 non-fasters in Greece, finding that even a few weeks without meat, fish, dairy and eggs changed body chemistry and gene activity.
The fasting pattern—followed 180-200 days a year without cutting total calories—gave researchers a real-world test of how periodic plant-based eating alters metabolism rather than simply reducing food intake.
Participants with a gene variant affecting FGF21 showed signs consistent with adipose tissue beiging, a shift in which white fat behaves more like heat-burning brown fat.
Another variant tied to the cholesterol-related LBR protein was upregulated during animal-product restriction within weeks, a response researchers said may help explain why similar diets produce different obesity risks.
The findings add to evidence that short-term plant-based eating can rapidly reshape metabolic pathways, while underscoring that genetic differences may determine who benefits most.