July 2, 2026

@michaelokun

When the scale drops in Parkinson's disease, should we worry? Unintentional weight loss means losing weight without trying. In Parkinson's disease it may signal changes in nutrition, swallowing, metabolism, cognition or disease progression and these deserve attention. Subramanian and Rusch describe in a letter in Movement Disorders why weight loss in Parkinson's disease remains under-recognized and why monitoring nutrition should become a routine part of care. Key points: - Weight loss in Parkinson's disease was associated w/ greater cognitive decline, whereas weight gain was associated w/ slower motor progression in previous longitudinal studies. - Nutrition screening tools are underutilized in Parkinson's care and there remains uncertainty about which tools are best suited for routine clinical practice. - The rise of virtual care, restrictive diets and GLP-1 medications makes accurate and longitudinal weight tracking more important than ever. My take: Weight loss in Parkinson's disease is frequently dismissed as inevitable or even desirable. I worry we may be missing an important biological signal. The number on the scale may be acting like the 'canary in the coal mine.' It may be telling us about swallowing issues, loss of smell, gastrointestinal dysfunction, frailty, muscle loss, medication interactions or changes in cognition long before these problems become obvious. I tell the folks in my clinic that I like them 'at least 5lbs heavier than ideal body weight' at all times, and definitely not lighter than ideal body weight. Nutrition is not a side issue in Parkinson's disease. It is foundational to strength, resilience, mobility and quality of life. Here are 5 points that resonated w/ me: 1- Health care providers should track weight trajectories over time and not just isolated measurements. 2- Losing weight unintentionally in Parkinson's disease should trigger a conversation and frequently a nutrition evaluation. 3- Dietitians should be viewed as essential members of the Parkinson's care team and not optional consultants. 4- Restrictive diets and weight loss medications may carry unique risks for some folks living w/ PD. 5- Watch your weight w/ PD.