#Dieting

A new randomized crossover trial published this month shows that diet quality, not just calories, influences weight and fat loss. Adults who followed minimally processed diets lost more weight and body fat over eight weeks than when they ate diets rich in ultra-processed foods, even though both plans met national healthy-eating guidelines. For Thai families planning meals, the findings offer concrete direction on making healthier choices at home.

The study design was highly controlled. Participants with overweight or obesity received all meals during two eight-week periods. One period used minimally processed foods with fresh ingredients and simple preparations. The other relied on ultra-processed branded ready meals and reformulated packaged products. A washout period separated the two phases. Both approaches aligned with healthy-eating guidance, but the minimally processed plan yielded superior outcomes in fat mass, fat percentage, and visceral fat. Triglycerides and other metabolic markers also improved more with minimally processed foods.

A groundbreaking randomized crossover trial published this month has revolutionized understanding of how food processing affects weight management. Adults consuming diets built from minimally processed foods achieved significantly greater weight and body fat reductions over eight weeks compared to when the same individuals ate diets composed primarily of ultra-processed products—despite both menu plans meeting national healthy-eating guidelines.

These findings intensify global debates about how industrial processing degree, rather than merely calories or individual nutrients, fundamentally shapes appetite regulation, body composition and long-term health outcomes. The implications for Thai families navigating daily meal decisions offer practical guidance for supporting weight control and chronic disease prevention through strategic food selection.