Early-life exposure to sugar during the first 1,000 days of life leaves a lasting mark on mental health, according to a study published in Translational Psychiatry. Researchers at the University of Surrey found that individuals subjected to post-war sugar rationing in the United Kingdom faced a significantly lower risk of anxiety decades later compared to those who grew up without restrictions.
How Post-War Sugar Rationing Shaped Long-Term Health
To understand how early nutrition impacts adult health, a team led by researchers at the University of Surrey analyzed medical data from more than 45,000 people born between 1951 and 1956. During and after the Second World War, the UK government enforced strict rationing of daily items like sugar from 1940 to September 1953, capping adult consumption at roughly 40 grams per day. The study evaluated participants across five distinct groups based on how long they experienced sugar rationing in utero and during early childhood up to 24 months of age, contrasting them with individuals born immediately after restrictions ended.
The findings revealed that participants exposed to the longest periods of sugar rationing reported a risk of anxiety that was 33% lower than those who never experienced rationing. “Conquering fully the impact that sugar can have on our health physical and mental throughout life can help guide public health policies and transform our diet,” stated Hana Navratilova, the lead author of the study.
Impact on Sweet Preferences and Psychiatric Outcomes
Beyond lowering the overall incidence of anxiety, early-life sugar restriction altered long-term dietary habits. Participants who lived through prolonged rationing reported a reduced preference for sweet foods in adulthood. The timing of chronic conditions also shifted. Groups subject to extended rationing developed anxiety and depression at a later median age—around 62 years old—compared to age 55 in the cohort that never experienced rationing.
“Despite the increase in sugar consumption after the end of rationing among the participants, early nutritional environments seem to have a lasting relevance for mental health,” said Nophar Geifman, a professor at the University of Surrey and senior author of the study.
While the study identified a clear association between early-life sugar exposure and subsequent anxiety risks, researchers noted that correlations with depression shifted when adjusted statistically, suggesting that adult dietary choices could partially modify that specific risk. Previous scientific literature cited by the authors indicates that diets high in sugar can reduce the density of serotonin neurons responsible for mood regulation, meaning early restriction may protect those critical neural pathways during a vulnerable developmental window.