Micronutrients & recovery
GLP-1 therapy for obesity increases the risk of nutritional deficiencies (e.g., iron, calcium, vitamins A, D, E, K, B1, B12, C) due to significant reductions in caloric intake and potential GI side effects that impair absorption.
Because GLP-1s make you eat much less, you might not get enough essential vitamins and minerals. Watch for signs like fatigue, hair loss, or poor wound healing. Prioritize nutrient-dense foods (vegetables, lean proteins, whole grains) and discuss with your doctor whether you need specific supplements, especially if your calorie intake is very low.
This large, rapid reduction can lead to insufficient intakes of essential vitamins and minerals... Examples nutrients of concern include iron, calcium, magnesium, zinc, and vitamins A, D, E, K, B1, B12, and C.
Why this rating
Based on clinical observations and trial data cited.
Source
Nutritional priorities to support GLP-1 therapy for obesity: a joint Advisory from the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association, and The Obesity Society
Dariush Mozaffarian et al. · American Journal of Clinical Nutrition · 2025
DOI 10.1016/j.ajcnut.2025.04.023
More from this paper
- GLP-1 receptor agonists for obesity treatment cause significant loss of lean body mass (approximately 38% of total weight loss) and muscle mass, increasing the risk of sarcopenia and bone loss, particularly in the absence of structured resistance training and adequate protein intake.Good
- Discontinuation of GLP-1 therapy for obesity leads to significant weight regain (up to two-thirds of lost weight within one year), even when accompanied by conventional nutritional counseling, highlighting the need for long-term lifestyle support.Good
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