By Stephen Beech

Obesity speeds up the development of dementia , reveals new research.

The first study evaluating the impact of obesity on Alzheimer’s disease blood biomarkers (BBMs) was conducted by American scientists.

The high-tech blood tests showed that BBM values increased up to 95% faster in obese people than in people who weren't seriously overweight.

Study senior author Professor Cyrus Raji said: “This is the first time we’ve shown the relationship between obesity and Alzheimer’s disease as measured by blood biomarker tests."

The research team accessed five-year data on 407 participants from the Alzheimer’s Disease Neuroimaging Initiative, which included amyloid positron emission tomography (PET) scans and blood samples.

PET scans show the brain’s amyloid burden, or the a

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