WWII Sugar Rationing Linked to Lower Dementia and Cancer Risk Decades Later
In July 2025, two studies were published in Neurology and npj Aging, followed by a third in August 2025 in PNAS, all investigating the long-term health impacts of sugar rationing in the UK from 1942 until September 1953, which restricted sugar consumption to approximately 40 grams per day. Those who experienced their first 1,000 days during this timeframe exhibited decreased risks for Alzheimer's, dementia, depression, and anxiety. The npj Aging research, led by Bing Zhang, revealed a 46% reduction in Alzheimer's risk among more than 60,000 participants from the UK Biobank. Additionally, the Neurology study indicated a 23% lower likelihood of dementia, while the PNAS paper, co-authored by Weilong Zhang, highlighted a decrease in five types of cancer. These results imply potential mechanisms such as longer telomeres and diminished granzyme B levels.
Key facts
- Sugar rationing in UK during WWII limited intake to ~40g/day (about 10 sugar cubes).
- Rationing ended in September 1953, after which sugar consumption nearly doubled.
- Studies published in Neurology, npj Aging (July 2025) and PNAS (August 2025).
- First 1,000 days from conception under rationing linked to 46% lower Alzheimer's risk.
- 27% lower risk of all-cause dementia and 11% lower depression risk found in npj Aging study.
- Neurology study found 23% lower dementia risk and 28% lower Alzheimer's risk.
- PNAS study found reduced incidence of breast, prostate, liver, rectal, and lung cancers.
- Liver cancer risk 69% lower; breast cancer risk 36% lower.
- Mechanisms include longer telomeres and lower granzyme B levels.
- Behavioral effects: adults raised under rationing consumed less sugar later in life.
Entities
Institutions
- Guangzhou First People's Hospital
- University of Cambridge
- MemorialCare Medical Group
- Healthy Brain Clinic
- UK Biobank
- Medical News Today
- Newsweek
- The Conversation
- Dietary Guidelines for Americans
Locations
- United Kingdom
- China
- California
- United States