High-inflammatory diets linked with increased dementia risk
In the journals
- Reviewed by Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing; Editorial Advisory Board Member, Harvard Health Publishing
Diets high in foods associated with inflammation may accelerate brain aging, leading to dementia, suggests a study published online May 6, 2022, by Alzheimer's & Dementia. Investigators studied almost 2,000 healthy people (average age 62) from the Framingham Heart Study who completed food questionnaires and underwent brain MRI. Data from the questionnaires were collected over 10 years and then used to calculate participants' Dietary Inflammatory Index (DII) scores.
The DII rates a person's eating habits based on a long list of substances and food types. A lower DII score suggests a more anti-inflammatory diet, while a higher score indicates a pro-inflammatory diet. Diets that are classified as pro-inflammatory typically include greater amounts of simple sugars, cholesterol, saturated fat, and fried foods.
Compared with people who had low DII scores, those with high DII scores had smaller brains and less gray matter, which are early markers for dementia. Men with high DII scores also were more likely to show evidence of small vessel strokes, which often don't cause immediately recognizable symptoms. The study only showed an association, but the findings support the ongoing advice that what you eat and how much can affect brain health as you age.
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About the Author
Matthew Solan, Executive Editor, Harvard Men's Health Watch
About the Reviewer
Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing; Editorial Advisory Board Member, Harvard Health Publishing
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