What I learned from Dr. Rhonda Patrick’s conversation with Dr. Dariush Mozaffarian
Listen to the podcast: The Hype vs. Data on Saturated Fat, Red Meat, & Seed Oils on FoundMyFitness, with host Dr. Rhonda Patrick and cardiologist Dr. Dariush Mozaffarian of the Food is Medicine Institute at Tufts University. You can find the episode page here.
Why Is This Important
Have you ever eaten well, stayed active, and still watched the scale creep up? It’s easy to blame yourself. This conversation offers a kinder explanation: our bodies may simply be burning fewer calories at rest than they used to, and the food we eat may be a big part of why.
Most of the calories you burn each day are used while you’re just sitting, breathing, and living. If that quiet burn slows down, weight can creep up even when you aren’t eating more. The good news is that real food, enough protein, and staying strong may help.
10 Points They Made
1. Something changed around the year 2000.
Dr. Mozaffarian pointed out that after about 2000, people weren’t eating more and were moving a bit more, yet weight kept going up. He called it “an unbelievable paradox.”
2. Most of your calories are burned at rest.
“If you’re a sedentary person, about 80% of your metabolism is resting energy expenditure,” he said. Even if you exercise, it’s still more than half. So small changes in that resting burn really add up.
3. Our resting burn may have dropped by about 220 calories a day.
He shared that the calories people burn each day appear to have fallen by about 220 over the last few decades. “That’s more than enough to explain the obesity epidemic,” he said.
4. We may be giving off less body heat.
His best guess is that our bodies are making less heat. We all have a little “brown fat” that burns energy to keep us warm, and it may be less active than it used to be. “We’re gaining weight because we’re cold,” he said.
5. Some everyday foods may help turn the heat back up.
Berries, nuts, turmeric, green tea, and seafood all contain compounds that may support that heat-making process. His simple advice: “eat real food basically.” A cold plunge is fine if you love it, but food comes first.
6. Your gut bugs may share your calories.
When we eat whole, fiber-rich foods, our gut bacteria may use some of the calories. With highly processed foods, our bodies may absorb nearly all of them. He believes much of the struggle has “nothing to do with conscious choice and overeating and willpower.”
7. Big, fast weight loss can slow your metabolism.
After people lose a lot of weight quickly, their bodies often burn 200 to 300 fewer calories a day. People feel colder, stall, and often regain. Your body isn’t working against you. It’s trying to protect you by holding on to energy.
8. What you eat afterward may matter.
He described studies where people who had lost weight burned more calories on a diet with less sugar and refined starch than on a low-fat diet. Scientists are still working out how big that difference is, but the message is encouraging: food quality may help keep your metabolism humming.
9. Focus on food quality, not counting calories.
“What I recommend to people is not to count calories at all… but to focus on the quality of the food they’re eating.” If you want to lose weight, he suggests going slow: “aim for a pound a month.”
10. Movement matters, especially for your muscles.
Exercise alone may not melt away pounds, but it builds muscle, reduces belly fat, and makes you healthier. “Physical activity is terrific and critical for good metabolic health,” he said. Muscle burns calories even at rest, so staying strong as we age is a real gift to ourselves.
5 Key Takeaways
- A slower resting burn may help explain why weight creeps up even when habits haven’t changed.
- Real, minimally processed food matters more than counting calories.
- Berries, nuts, green tea, turmeric, seafood, and fermented foods may help your body make heat and feed your gut.
- Slow and steady weight loss, about a pound a month, may be kinder to your metabolism.
- Strength work, enough protein, and regular chair yoga can support your metabolism, even when the scale barely moves.
Try This This Week
- Add protein to each meal, like eggs, yogurt, fish, beans, lentils, or tofu.
- Swap one packaged snack for berries and a handful of nuts.
- Try a cup of green tea, a pinch of turmeric, or a spoonful of sauerkraut or kefir.
- Two or three days this week, do a few slow sit-to-stands from a sturdy chair.
- Notice how your clothes fit and how your energy feels, not just the number on the scale.
This post shares the speakers’ views from the episode and isn’t personal medical advice. If you have questions about your health, talk with your doctor.
