A new study links exposure to sugar during the first 1,000 days of life to an increased risk of anxiety in adulthood, along with changes in certain brain regions and a preference for sweet foods.
The study was conducted by researchers from the University of Surrey in Britain, who found that people who were exposed to less sugar during pregnancy and the first two years of their lives were less likely to develop anxiety in adulthood, and also showed a lower tendency to prefer sweet foods.
The researchers relied on data from more than 45,000 people in the UK Biobank, who were born between 1951 and 1956, a period when Britain was implementing a sugar rationing system after World War II.
Researchers compared individuals who experienced sugar restriction during pregnancy and continued this restriction for periods ranging from 6 to 12, 18, and 24 months with those whose restriction was limited to pregnancy, as well as with individuals who did not experience any restriction. The results showed that the risk of developing anxiety was lower among those who experienced sugar restriction for a longer period during their early lives, and this association was more pronounced in women.
Researchers also observed a link between early sugar exposure and depression, but this link declined in statistical significance after taking other factors into account, suggesting that it may be related to the diet followed in adulthood.
The team also examined brain imaging data and found differences in gray matter volume in 80 out of the 139 regions analyzed. Further analysis revealed significant differences in 11 of these regions between most of the rationing groups and those who did not undergo rationing, including regions of the cerebellum.
The study also showed that people who were subjected to sugar rationing for a longer period during pregnancy and the first two years of life were less likely to prefer sweet foods in adulthood, suggesting that the influence of early diet may persist into later eating habits.
Dr. Hana Navratilova, who led the study, said that researchers became interested in studying this relationship after previous research showed a link between a preference for sugary foods and some mental health problems.
Professor Nouvar Giffman, the lead researcher on the study, said that the UK Biobank data provided a rare opportunity to study the effects of sugar rationing, noting that the results show a link between reduced sugar exposure early in life, a reduced preference for sweet foods, and a lower risk of developing anxiety in adulthood.
The study highlights the importance of nutritional conditions in the early stages of life, while acknowledging the need for further research to understand the nature of the relationship between childhood sugar exposure and long-term mental health and brain development.
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