A new long-term study of adults over 51 confirms that people who are overweight or obese at the time of a dementia diagnosis live longer than those in a normal weight range. Researchers found that individuals with class 1 obesity had a 27 percent lower risk of death after diagnosis, even when controlling for other chronic conditions and smoking. While excess weight is a known risk factor for developing dementia earlier in life, having those energy reserves appears to help the body better withstand the physiological wasting that accompanies the disease.
It is tempting to read this as a prescription to gain weight in middle age, but the authors are careful to note the study was not designed to test that question. Instead, it highlights how pre-diagnosis weight loss can distort baseline data, making normal-weight patients look sicker because they have already dropped pounds. The real takeaway is practical rather than prescriptive: nutrition deserves far more clinical attention as the disease progresses, particularly given how difficult eating becomes for many patients.
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