Caloric Intake and Dietary Management for Weight Loss in Prader-Willi Syndrome

Diet Composition and Nutritional Requirements

The American Academy of Pediatrics guidelines note that individuals with Prader-Willi Syndrome may require as little as 60% of the calories that similarly sized children without PWS might require for adequate growth, emphasizing the need for a strictly fat-reduced and carbohydrate-modified diet with adequate micronutrient supplementation 1, 2
A dietitian experienced in PWS should be worked with to ensure nutritional adequacy despite the marked restriction, providing low-fat protein sources and complex carbohydrates to maximize satiety within the caloric restriction 1, 2

Growth hormone therapy should be strongly considered as an adjunct to dietary management, as it improves body composition by increasing lean mass and energy expenditure, and prevents short stature that results from severe caloric restriction alone, with referral to pediatric endocrinology for GH evaluation in all PWS patients on restricted diets 1, 2, 5

Standard pediatric weight loss diets are insufficient for PWS patients due to their profoundly reduced metabolic rate, and very-low-calorie diets require medical supervision but may be necessary in some PWS patients given their unique physiology 3, 4