Is rapid weight loss on GLP-1 medication linked to any nutritional deficiency risks?

It's a legitimate consideration. Eating significantly less overall makes it easier to fall short on protein and certain micronutrients if food choices aren't intentional, which is part of why some providers recommend a general multivitamin and closer attention to protein intake during treatment. It's manageable with some awareness rather than an inevitable outcome, but it's not something to assume won't happen just because appetite suppression feels effortless. References: https://obesitycanada.ca/healthcare-professionals/adult-clinical-practice-guideline/