Ozempic and Vitamins: What Supplements You Need on GLP-1 Medications
Ozempic and Vitamins: What Supplements You Need on GLP-1 Medications
By Dr. Onikepe Adegbola, MD PhD — Johns Hopkins-trained physician-scientist and founder of Casa de Sante
Key Takeaways
- Eating 30-50% fewer calories means 30-50% fewer vitamins and minerals from food — supplementation becomes essential, not optional
- The most common deficiencies on GLP-1: B12, vitamin D, iron, calcium, magnesium, and zinc
- Delayed gastric emptying from GLP-1 medications can affect the absorption of some oral supplements
- Protein is the most critical "supplement" — muscle loss without adequate protein is the biggest long-term risk
- Fat-soluble vitamins (A, D, E, K) require some dietary fat for absorption — do not take on an empty stomach
Why GLP-1 Patients Need Supplements
The math is simple. If you normally eat 2,200 calories and your food provides the RDA of vitamins and minerals, then eating 1,200 calories provides roughly 55% of your RDA. You are running a consistent nutritional deficit.
Short-term, your body compensates using stored reserves. Long-term (and GLP-1 treatment typically lasts years), those reserves deplete. Symptoms appear: fatigue, hair loss, brain fog, muscle weakness, brittle nails, mood changes, and poor wound healing.
Essential Supplements for GLP-1 Patients
1. Protein
This is the most critical supplement. GLP-1-related weight loss includes 20-40% lean mass (muscle) unless protein intake is aggressively maintained. Muscle loss reduces metabolic rate, making weight regain more likely long-term.
- Target: 1.2-1.6g per kg of goal body weight daily
- For a 150 lb goal weight: 82-109g protein daily
- Casa de Sante Whey Protein (Vanilla) — 25g protein per shake, low FODMAP, designed for GLP-1 patients
- Chocolate Whey Protein for variety
- Vegan Protein for dairy-free option
2. Multivitamin
A comprehensive daily vitamin covers the micronutrient gaps from reduced food intake. Choose one designed for adults with higher doses of B12, D, and iron.
- Casa de Sante Daily Vitamin — Formulated for GLP-1 patients with boosted B12, D3, iron, calcium, and zinc. Low FODMAP certified.
3. Vitamin B12
B12 absorption requires intrinsic factor from the stomach. GLP-1 medications alter gastric function. Combined with reduced meat intake (a primary B12 source), deficiency is common.
Symptoms of deficiency: Fatigue, numbness/tingling in hands and feet, cognitive fog, depression.
Dose: 500-1000 mcg daily (sublingual preferred — absorbs under the tongue, bypassing the stomach).
4. Vitamin D
Already deficient in 42% of Americans before starting GLP-1. Reduced food intake and less dietary fat (needed for D absorption) worsen this.
Symptoms of deficiency: Bone pain, fatigue, mood changes, frequent infections.
Dose: 2000-4000 IU daily with a meal containing fat.
5. Iron (Especially for Women)
Menstruating women already have higher iron needs. Reduced meat consumption on GLP-1 reduces dietary iron. Deficiency causes fatigue, dizziness, cold intolerance, and restless legs.
Dose: Depends on lab values. Do not supplement without checking ferritin levels — too much iron is harmful.
6. Calcium and Magnesium
Rapid weight loss increases bone turnover. Calcium and magnesium support bone density and muscle function. Magnesium also helps with constipation (common on GLP-1).
Dose: Calcium 500-600mg daily. Magnesium glycinate 200-400mg daily.
7. Collagen
Rapid weight loss causes skin laxity, hair thinning, and joint discomfort. Collagen peptides provide the specific amino acids (glycine, proline, hydroxyproline) for skin, hair, nail, and joint support.
- Casa de Sante Collagen Peptides — 15g collagen per serving. Dissolves in any beverage. Zero taste.
8. Digestive Enzymes
Technically not a vitamin, but essential for GLP-1 patients. Delayed gastric emptying means food sits longer and may not digest completely. Enzyme supplementation ensures you actually absorb the nutrients from the food you eat and the supplements you take.
- Casa de Sante Digestive Enzymes — Take with meals to maximize nutrient absorption.
🛒 Complete GLP-1 Supplement Stack
- Whey Protein — #1 priority: prevent muscle loss
- Daily Vitamin — Cover B12, D, iron, calcium, zinc gaps
- Collagen Peptides — Support skin, hair, joints during weight loss
- Digestive Enzymes — Ensure nutrient absorption from reduced intake
- Regularity Companion — Manage GLP-1 constipation
Medical Disclaimer: This article is for educational purposes only. Supplement needs should be assessed through blood work with your healthcare provider. Do not take iron supplements without checking lab values first. Dr. Adegbola is the founder of Casa de Sante.
