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Pro-Inflammatory Diet is Associated with Increased Frailty Onset in Middle-Aged and Older Adults

Results of a study published in the American Journal of Clinical Nutrition indicate that regularly consuming a diet of pro-inflammatory foods – those rich in simple carbohydrates or in saturated fats – is associated with increased likelihood of developing frailty in middle-aged and older adults.

Courtney L Millar, Ph.D., a research fellow at Harvard Medical School, is the lead author of the study: “A Pro-Inflammatory Diet is Associated with Increased Odds of Frailty after 12-Year Follow-up in a Cohort of Adults”.

Approximately one-in-six community-dwelling older adults will develop frailty, a serious condition of impaired function of ability, which carries increased risk of falls, hospitalisations, and mortality – making it a significant public health issue. Previous studies linked specific nutrients with frailty or physical function but did not capture an individual’s entire diet and its impact on frailty over time. To address this concern, the researchers calculated dietary inflammatory index (DII®) score that reflects the overall inflammatory potential of one’s diet. This study, led by Dr. Millar, looked at the role of diet-associated inflammation on the likelihood of developing frailty.

The study of 1,701 relatively healthy participants from the Framingham Heart Study found that a pro-inflammatory diet was associated with increased odds of frailty over a 12-year period. A one-point higher DII score (on a roughly 16-point scale) was associated with 16 per cent higher odds of developing frailty over 12 years. The quarter of participants consuming the most pro-inflammatory diet were more than twice as likely to develop frailty as the quarter of participants who ate the most anti-inflammatory diet.

The study indicated that regularly eating foods that contain nutrients such as dietary fibre and dietary antioxidants (such as vitamin C, vitamin E, and flavonoids) may prevent older adults from becoming frail,” Dr. Millar said. “While more studies are necessary, guidelines based on an anti-inflammatory diet may help reduce the percentage of older adults who may develop frailty and related conditions such as falls and fractures, which can improve their quality of life.”

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