Zero appetite is the drug working — and it is also the main risk: people under-eat so much that they lose muscle, hair and energy. The frame that helps: food stops being about hunger and becomes about targets. Eat to the protein and fiber numbers, not to appetite.
GLP-1s suppress hunger signals strongly, especially at higher doses. Without hunger as a cue, intake can drop below what protects muscle and micronutrients.
The appetite loss is expected and is the mechanism. The risk is under-eating protein and calories. Eating small protein-forward meals on a schedule — not waiting for hunger — protects muscle and energy.
Small frequent meals, nutrient-dense choices (Greek yogurt, eggs, nuts, protein shakes), and setting meal times regardless of hunger. Smoothies are the easiest way to get nutrition in when chewing feels hard.
The commonly cited floor is about 1200 kcal/day for most adults — below that, micronutrient gaps and muscle loss accelerate. If you are consistently far under, a multivitamin and a protein focus help, and your provider should know.
Consistently eating far below the 1200 kcal floor, or rapid unintended weight loss — discuss with your healthcare provider.
This guide presents USDA nutrition data and the diet framework from the JAMA 2025 patient guidance and 2026 European obesity nutrition consensus for informational purposes only. It is not medical advice. If you are concerned about any symptom, contact your healthcare provider.