Two-Week Diet Swap Highlights Immune Impact of Western Eating

A study published in Nature Medicine shows that switching from a traditional African diet to a Western diet for just two weeks can trigger inflammation, weaken immune responses, and activate disease-related processes. Conducted by Radboud University Medical Center and KCMC University in Tanzania, the study involved 77 healthy Tanzanian men. Participants switched diets or consumed a fermented banana drink, with health markers tracked before, during, and after the change.

Those adopting a Western diet saw increased inflammatory proteins and reduced immune defense. In contrast, those returning to traditional African eating—rich in vegetables, fiber, and fermented foods—experienced lowered inflammation. Some positive effects persisted for weeks, suggesting lasting benefits.

This is the first in-depth study of traditional African diets and their protective effects against lifestyle diseases like diabetes and cardiovascular issues. Researchers emphasize the importance of preserving these diets amid Africa’s urbanization and rising processed food consumption.

05-04-2025

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