Month-Long Vegan Diet Linked to Slower Biological Aging, Study Finds

A small study of about 50 adults (half vegan, half meat-eaters with similar calorie intake) found that a one-month vegan diet altered DNA methylation and slowed aging according to epigenetic clocks, with vegans showing lower neutrophils and higher CD4 T cells; researchers say nutrition can shape biology at the molecular level, but larger trials are needed to confirm long-term health benefits, and diet quality matters given concerns about processed vegan foods.