We’ve all seen the headlines. One day, eggs are a superfood; the next, they’re the enemy. It’s hard to know what to believe when every “expert” has a different opinion.
But what happens when you take identical twins—people with the exact same DNA—and put them on two different diets?
A recent study published in JAMA Network Open did exactly that (Landry MJ, et.al., 2023). The results? They might change the way you look at your dinner plate.
The Ultimate “A/B Test” for Your Body
In marketing, we love A/B testing. It’s the only way to know what actually works. This study was the ultimate biological A/B test.
Researchers took 22 pairs of identical twins. For 8 weeks:
- Twin A ate a healthy vegan diet (lots of veggies, legumes, and whole grains).
- Twin B ate a healthy omnivorous diet (meat, dairy, and plants).
Because they are twins, we can strip away the “it’s just my genetics” excuse. The only major variable was the food.
The Results Are In
After just two months, the twins on the vegan diet saw significant improvements across three major health markers:
- Lower LDL Cholesterol: Their “bad” cholesterol dropped by an average of 13.9 mg/dL. That’s a massive win for heart health.
- Better Insulin Levels: Fasting insulin dropped by 2.9 μIU/mL. Lower insulin usually means better blood sugar control and a lower risk of diabetes.
- Natural Weight Loss: Even without strictly counting calories, the vegan twins lost about 4.2 lbs (1.9 kg) more than their meat-eating siblings.
Why This Matters for You
You don’t have to be an identical twin to see these benefits. The data shows that shifting toward a plant-based diet—even for a short period—can “reset” your cardiometabolic health.
The secret sauce? It’s not just about what you cut out (meat); it’s about what you add in. The vegan twins loaded up on high-fiber fruits, nuts, and seeds.
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My Takeaway
You don’t have to go 100% vegan overnight to win. But the data is clear: Plants are a high-ROI investment for your body.
If you want more energy, a leaner waistline, and a stronger heart, try swapping out a few meat-heavy meals for plant-based alternatives this week. Your DNA will thank you.
Reference
Landry MJ, Ward CP, Cunanan KM, Durand LR, Perelman D, Robinson JL, Hennings T, Koh L, Dant C, Zeitlin A, Ebel ER, Sonnenburg ED, Sonnenburg JL, Gardner CD. Cardiometabolic Effects of Omnivorous vs Vegan Diets in Identical Twins: A Randomized Clinical Trial. JAMA Netw Open. 2023 Nov 1;6(11):e2344457. doi: 10.1001/jamanetworkopen.2023.44457. Erratum in: JAMA Netw Open. 2023 Dec 1;6(12):e2350422. doi: 10.1001/jamanetworkopen.2023.50422. PMID: 38032644; PMCID: PMC10690456.
