Limiting sugar before age two linked to better brain health

What the report says

Nile Post, citing a BBC report, says scientists have found a possible link between very low sugar intake in the first two years of life and better brain health much later. The report focuses on research that used the end of sugar rationing in the United Kingdom after World War Two as a “natural experiment,” because sugar consumption rose sharply once restrictions ended in September 1953.

According to the article, researchers examined nearly 65,000 participants in the UK Biobank and compared people born around the period when sugar rationing was still in force with those born after it ended. The analysis, led by researchers at the Hong Kong University of Science and Technology in Guangzhou and published in Neurology, found that those exposed to rationing up to age two had a 23% lower risk of dementia and, when diagnosed, received the diagnosis about two and a half years later.

The findings add to wider research suggesting the first 1,000 days of life can influence long-term health. The article notes that earlier work using the same post-rationing period linked higher sugar exposure with later risks such as type 2 diabetes and high blood pressure.

Experts quoted in the report urged caution. They said the study was observational, meaning it can show an association but cannot prove that lower sugar intake caused the reduced dementia risk. They also noted that researchers could not know exactly how much sugar each person consumed, and that childhood feeding practices in the 1940s and 1950s differ from today. The broader takeaway, experts said, is that a balanced diet remains important for brain health at any age.