Children who lived through sugar rationing during World War II grew up with a significantly lower risk of chronic kidney disease.

The first 1000 days of life are known to be a critical window for long-term health, but the effects of sugar intake were never fully clear. A natural experiment involving historical sugar restrictions revealed that limiting sweets in early childhood programs the kidneys for better health decades later. People exposed to these restrictions had much lower rates of both chronic and acute kidney issues as adults. This suggests that high sugar intake in infancy does more than just cause cavities or weight gain. It physically alters the development of vital organs in a way that can lead to permanent vulnerability later in life.