24/03/2026
Most people assume weight gain is simply a “calories in vs calories out” equation.
But a recent, tightly-controlled nutrition trial found something that should make us pause.
When participants ate an ultra-processed diet, they gained more fat mass than when they ate an unprocessed diet, even though total calories were the same.
When people switched from unprocessed to ultra-processed, they gained roughly an extra kilogram (about 2 lbs) of fat on average in just three weeks.
One possible reason is inflammation. Ultra-processed foods are known to increase inflammatory markers in the body, and higher levels of inflammation can influence how and where we store fat.
The takeaway isn’t that you can never eat something processed. It’s that if your diet is heavily based on ready meals, packaged snacks, and “fake foods” in shiny wrappers, your body may store and handle it differently, even when you’re not technically overeating.
For many people over 50, small swaps toward fresher, less processed options can make a noticeable difference to energy, weight stability, and long-term health.
📝 This passage is from my weekly email, Three Tip Friday, where I share simple, evidence-based tips for staying strong and mobile after 50.
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