Indirectly, yes. GLP-1 agonists significantly reduce appetite, and many people eat much less without realizing they're under-eating on key nutrients. Common deficiencies to watch for include protein (critical for preserving muscle during weight loss), B vitamins, iron, and electrolytes—especially if you're experiencing vomiting or diarrhea. Prioritize nutrient-dense foods over empty calories, consider a daily multivitamin, and make sure you're hitting a minimum protein target (many community members aim for 80-100g/day).