Introduction
Micronutrients are minerals required by the human body in minute amounts, often measured in micrograms or milligrams. Though small in quantity, their significance cannot be overstated — these elements underpin key physiological functions such as metabolism, immune response, development, and cellular repair. Beyond their critical roles in health, emerging research unveils that micronutrients have also played a vital role in shaping our genetic makeup throughout human evolution.
On September 10, 2025, a groundbreaking study published in The American Journal of Human Genetics (Cell Press) illuminated how ancient human populations across the globe genetically adapted to regional variations in micronutrient availability — particularly iron, calcium, zinc, selenium, iodine, magnesium, and others. This study led by Jasmin Rees, a postdoctoral researcher at the University of Pennsylvania and former University College London doctoral candidate, represents the first comprehensive global analysis investigating how multiple micronutrients have driven human evolutionary adaptations.
