Which Vitamins To Take On Mounjaro?

Mounjaro (tirzepatide) is an effective medication for weight loss and diabetes management, but its appetite-suppressing effects may reduce overall food intake. This can lead to nutrient deficiencies if you’re not getting enough vitamins and minerals from your diet.

In this guide, we’ll cover the best vitamins and supplements to take while on Mounjaro, why they’re important, and how to prevent deficiencies.

Key Takeaways

Mounjaro Can Lower Nutrient Intake: 

Because Mounjaro reduces appetite, you might eat less of the important vitamins and minerals your body needs, like B12, Vitamin D and Calcium.

Supplements Help Keep You Healthy: 

Taking key vitamins like Iron for energy, Magnesium for muscles and Protein to prevent muscle loss can help your body stay strong while on Mounjaro.

Listen to Your Body & Get Checked: 

If you feel tired, weak, or notice changes in your health, it could be a sign of a vitamin deficiency. Eating a balanced diet, staying hydrated and having regular check-ups with your GP can help.

Why Might You Need Vitamins on Mounjaro?

Mounjaro works by reducing appetite and changing how your body processes food. While this is great for weight loss, it can also mean you’re eating less of the essential nutrients your body needs.

Common reasons for nutrient deficiencies using Mounjaro:

✅ Reduced appetite: Eating less means fewer vitamins and minerals from food.
✅ Dietary changes: Some people may cut out entire food groups, limiting nutrient intake.
✅ Faster weight loss: Losing more than 1kg per week may deplete stored nutrients.
✅ Limited sun exposure: In the UK, low sunlight in winter can cause vitamin D deficiencies.

Essential Vitamins to Take on Mounjaro

1. Vitamin B12 – For Energy & Nerve Health

✅ Supports red blood cell production and brain function.
✅ Helps prevent fatigue, tingling sensations, and memory issues.
✅ Often low in plant-based diets, so vegans and vegetarians should supplement.

💊 Recommended Dose: 2.4mcg daily (higher for those over 50 or on plant-based diets).

🔎 Sources: Fish, meat, eggs, dairy, or B12 supplements.

2. Vitamin D – For Bone & Immune Health

✅ Supports bone health, immune function, and mood.
✅ Low intake can cause weak bones, frequent illnesses and depression.
✅ The UK’s lack of sunlight in winter makes vitamin D supplementation essential.

💊 Recommended Dose: 25mcg (1,000 IU) daily (more if overweight).

🔎 Sources: Sunlight, oily fish, fortified foods, or vitamin D supplements.

3. Calcium – For Strong Bones & Muscles

✅ Maintains bone strength, muscle function and heart health.
✅ Low intake can cause brittle bones, muscle cramps, and osteoporosis.
✅ Women, especially postmenopausal, are at higher risk of calcium deficiency.

💊 Recommended Dose: 1,000mg daily.

🔎 Sources: Dairy, leafy greens, almonds, or calcium supplements.

⚠ Tip: Take calcium separately from iron to improve absorption.

4. Iron – For Oxygen Transport & Energy

✅ Prevents anaemia, which causes fatigue, dizziness, and shortness of breath.
✅ Appetite suppression may reduce iron intake, especially in women.

💊 Recommended Dose: 8.7mg (men) | 14.8mg (women under 50) daily.

🔎 Sources: Red meat, spinach, lentils, or iron supplements.

⚠ Tip: Take with vitamin C (like orange juice) for better absorption. Avoid taking it with tea or coffee.

5. Magnesium – For Muscle & Nerve Function

✅ Supports over 300 biochemical reactions, including energy production, sleep and digestion.
✅ Low magnesium levels may cause muscle cramps, fatigue and irregular heartbeat.

💊 Recommended Dose: 310-320mg (women) | 400-420mg (men) daily.

🔎 Sources: Nuts, seeds, whole grains, or magnesium supplements.

⚠ Tip: Magnesium glycinate is best absorbed and is gentle on the stomach.

6. Zinc – For Immune & Metabolic Health

✅ Supports immune function, wound healing and metabolism.
✅ Helps prevent hair loss and skin problems.

💊 Recommended Dose: 8mg (women) | 11mg (men) daily.

🔎 Sources: Meat, shellfish, nuts, or zinc supplements.

⚠ Tip: Avoid taking zinc and iron together, as they compete for absorption.

7. Potassium – For Heart & Muscle Health

✅ Regulates blood pressure, nerve signals and muscle function.
✅ Low levels can cause muscle weakness, cramps and irregular heartbeat.

💊 Recommended Dose: 3,500mg daily.

🔎 Sources: Bananas, potatoes, beans, avocados, or potassium supplements.

⚠ Tip: If taking supplements, speak to your GP first—too much potassium can be harmful.

8. Protein – For Muscle Preservation & Recovery

✅ Essential for maintaining muscle mass during weight loss.
✅ Helps with healing, immune function and energy.

💊 Recommended Intake: 1.2-2.0g per kg of body weight daily.

🔎 Sources: Lean meats, fish, eggs, dairy, tofu, beans, or protein shakes.

⚠ Tip: Consider whey or plant-based protein supplements if your intake is too low.

How to Prevent Nutrient Deficiencies on Mounjaro

✅ 1. Maintain a Balanced Diet

• Prioritise whole foods rich in vitamins and minerals.

• Eat a variety of lean proteins, vegetables, whole grains and healthy fats.

✅ 2. Supplement When Necessary

• If you struggle to get enough nutrients from food, consider supplements.

• Speak to your GP before taking new vitamins.

✅ 3. Monitor Your Health

• Get regular blood tests to check vitamin levels.

• Watch for signs of deficiency, such as fatigue, weakness, or dizziness.

✅ 4. Stay Hydrated

• Drink at least 2 litres of water daily to aid digestion and nutrient absorption.

✅ 5. Talk to Your GP or Pharmacist

• If you have concerns about deficiencies, seek medical advice.

• Personalised blood tests and diet plans can help you stay healthy.

Signs of Vitamin Deficiency on Mounjaro

💡 Watch out for these warning signs:

⚠ If you experience any of these symptoms, consult your GP immediately.

Final Thoughts: Should You Take Vitamins on Mounjaro?

Taking Mounjaro for weight loss or diabetes management is a positive step towards better health, but ensuring you get enough nutrients is just as important.

✅ Remember:
✔ Not everyone using Mounjaro needs supplements, but deficiencies can happen.
✔ Focus on a balanced diet with nutrient-rich foods.
✔ If needed, supplement with essential vitamins like B12, D, calcium, and iron.
✔ Get regular blood tests and adjust your diet accordingly.

💡 Always consult with your GP before starting any supplements to ensure they’re right for you.

By staying informed and making smart choices, you can maximise the benefits of Mounjaro while maintaining optimal health and well-being.

Disclaimer: This guide is for informational purposes only. Always consult a healthcare professional before starting any new medication or lifestyle changes.

Essential Tips for Using Mounjaro Safely and Effectively

Want to get the best results from Mounjaro? UK Meds complete guide to Using A Mounjaro Injection covers everything you need to know, from:

• Managing your dose

• Tracking progress

• Dietary changes

• Exercise recommendations

• Dealing with side effects

• Which vitamins you can take

• How to handle sulphur burps

• Where to find support in the UK

Our usage guide has all the advice you need to kickstart a smoother weight loss journey with Mounjaro.