Vitamins To Take On Mounjaro UK | Complete Guide 2025

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Cheapest Vitamins to Take on Mounjaro - UK Price £124.99

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Pricing Disclaimer: Prices on some pages may not be up to date — the live pricing table below and pricing shown during consultation are official current prices and take precedence over any other figures on the site.

Mounjaro (Tirzepatide)
Weeks 1–4

2.5mg

1 pen • 4 Weeks

£145 £124.99

£31.25 / Per Week

Your starting dose – designed to help your body adjust gently to treatment

⭐ Future Orders at £145
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Mounjaro (Tirzepatide)
Weeks 5–8

5mg

1 pen • 4 Weeks

£179 £159.00

£39.75 / Per Week

First step up – builds on your progress as your body adapts to treatment

⭐ Future Orders at £179
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Mounjaro (Tirzepatide)
Weeks 9–12

7.5mg

1 pen • 4 Weeks

£220 £200.00

£50.00 / Per Week

Mid-range dose – for continued progression and enhanced results

⭐ Future Orders at £220
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Mounjaro (Tirzepatide)
Weeks 13–16

10mg

1 pen • 4 Weeks

£245 £225.00

£56.25 / Per Week

Higher strength dose – supports significant weight loss progress

⭐ Future Orders at £245
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Mounjaro (Tirzepatide)
Weeks 17–20

12.5mg

1 pen • 4 Weeks

£270 £250.00

£62.50 / Per Week

Advanced dose – for patients requiring stronger therapeutic effect

⭐ Future Orders at £270
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Mounjaro (Tirzepatide)
Weeks 21+

15mg

1 pen • 4 Weeks

£287 £267.00

£66.75 / Per Week

Maximum dose – the highest available strength for optimal results

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Wegovy (Semaglutide)
Weeks 1–4

0.25mg

1 pen • 4 Weeks

£89 £69.00

£17.25 / Per Week

Your starting dose – eases your body into treatment with minimal side effects

⭐ Future Orders at £89
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Wegovy (Semaglutide)
Weeks 5–8

0.5mg

1 pen • 4 Weeks

£99 £79.00

£19.75 / Per Week

First step up – continues building tolerance for long-term success

⭐ Future Orders at £99
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Wegovy (Semaglutide)
Weeks 9–12

1mg

1 pen • 4 Weeks

£119 £99.00

£24.75 / Per Week

Mid-range dose – where most patients start seeing meaningful results

⭐ Future Orders at £119
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Wegovy (Semaglutide)
Weeks 13–16

1.7mg

1 pen • 4 Weeks

£169 £149.00

£37.25 / Per Week

Higher strength – supports accelerated weight loss progress

⭐ Future Orders at £169
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Wegovy (Semaglutide)
Weeks 17+

2.4mg

1 pen • 4 Weeks

£199 £179.00

£44.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199
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Wegovy Oral Pill
Weeks 1–4

1.5mg

1 pen • 4 Weeks

£83.00 £63.00

£20.75 / Per Week

Your starting dose – eases your body into treatment with minimal side effects

⭐ Future Orders at £83.00
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Wegovy Oral Pill
Weeks 5–8

4mg

1 pen • 4 Weeks

£110.00 £90.00

£27.50 / Per Week

First step up – continues building tolerance for long-term success

⭐ Future Orders at £110.00
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Wegovy Oral Pill
Weeks 9–12

9mg

1 pen • 4 Weeks

£140.00 £120.00

£35.00 / Per Week

Mid-range dose – where most patients start seeing meaningful results

⭐ Future Orders at £140.00
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Wegovy Oral Pill
Weeks 13+

25mg

1 pen • 4 Weeks

£199.00 £179.00

£49.75 / Per Week

Maximum dose – the highest available strength for optimal weight management

⭐ Future Orders at £199.00
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Your Complete Guide to What Vitamins To Take On Mounjaro

Published on: June 03, 2026

Understanding which vitamins to take on Mounjaro UK is essential for patients using tirzepatide, as rapid weight loss and reduced food intake can increase the risk of nutritional deficiencies. As a UK-registered pharmacy with thousands of Mounjaro patients under our care, we've compiled this evidence-based guide to help you maintain optimal nutrition throughout your treatment journey.

Why Vitamin Supplementation Matters on Mounjaro

Mounjaro (tirzepatide) works by activating GIP and GLP-1 receptors, which significantly reduces appetite and slows gastric emptying [1]. While these mechanisms drive the impressive average weight loss of 22.5% observed in the SURPASS-3 trial, they also mean patients typically consume 20-30% fewer calories daily, raising the risk of micronutrient deficiencies.

Clinical studies of GLP-1 receptor agonists have documented deficiencies in vitamin B12, vitamin D, folate, and iron among patients achieving substantial weight loss [2]. These deficiencies can manifest as fatigue, muscle weakness, hair thinning, and compromised immune function — symptoms that patients often mistake for medication side effects rather than nutritional gaps.

The MHRA guidance on weight management medications emphasises the importance of nutritional monitoring, particularly for patients losing more than 1.5kg per week. At Cured Pharmacy, our clinical team routinely advises vitamin supplementation as part of a comprehensive Mounjaro treatment plan, subject to individual prescriber assessment.

Essential Vitamins to Take on Mounjaro: Evidence-Based Recommendations

Based on clinical trial data and our experience supporting UK Mounjaro patients, certain vitamins require particular attention. Vitamin B12 deficiency is especially common, as reduced stomach acid production — a known effect of GLP-1 medications — impairs B12 absorption from food [2]. We typically recommend sublingual methylcobalamin 1000mcg daily or a high-quality B-complex supplement.

Vitamin D deficiency affects over 40% of the UK population at baseline, and this risk increases during weight loss as fat-soluble vitamins like D are stored in adipose tissue that's being metabolised [3]. A daily supplement of 1000-2000 IU vitamin D3 (cholecalciferol) helps maintain bone health and immune function, particularly important during the winter months in the UK.

Folate (vitamin B9) works synergistically with B12 in red blood cell formation and DNA synthesis. Patients consuming fewer leafy greens and fortified cereals may require 400mcg folic acid daily. Iron is another concern, especially for menstruating women, as reduced meat intake can lead to iron deficiency anaemia — though iron supplementation should only follow blood testing, as excessive iron can cause gastrointestinal distress similar to Mounjaro's own side effects.

Calcium and Magnesium for Bone and Muscle Health

Rapid weight loss can accelerate bone mineral density loss, making calcium supplementation (1000-1200mg daily) advisable, particularly for postmenopausal women [3]. Magnesium supports over 300 enzymatic reactions and helps prevent muscle cramps — a complaint we occasionally hear from Mounjaro patients. A combined calcium-magnesium-vitamin D supplement offers convenient coverage of these three nutrients.

Protein and Amino Acid Considerations

While not technically vitamins, adequate protein intake is critical for Mounjaro patients to preserve lean muscle mass during weight loss. Clinical guidelines recommend 1.2-1.6g protein per kilogram of ideal body weight daily [4]. When appetite suppression makes meeting this target difficult through food alone, a high-quality whey or plant-based protein powder can bridge the gap.

Essential amino acids, particularly leucine, support muscle protein synthesis and may help prevent the muscle loss that typically accompanies caloric restriction. Some patients benefit from branched-chain amino acid (BCAA) supplements, though whole-food protein sources remain the gold standard where appetite allows.

Vitamin/Mineral Recommended Daily Amount Primary Function Food Sources
Vitamin B12 1000mcg (sublingual) Red blood cell formation, nerve function Meat, fish, dairy, fortified cereals
Vitamin D3 1000-2000 IU Bone health, immune function Fatty fish, fortified dairy, sunlight
Folate (B9) 400mcg DNA synthesis, cell division Leafy greens, legumes, fortified grains
Calcium 1000-1200mg Bone density, muscle function Dairy, fortified plant milk, leafy greens
Magnesium 300-400mg Muscle function, energy metabolism Nuts, seeds, whole grains, dark chocolate
Omega-3 (EPA/DHA) 1000-2000mg Heart health, inflammation reduction Fatty fish, algae supplements
Vitamin C 500-1000mg Collagen synthesis, immune support Citrus fruits, berries, peppers
Zinc 15-30mg Immune function, protein synthesis Meat, shellfish, legumes, seeds

Omega-3 Fatty Acids and Fat-Soluble Vitamins

Omega-3 fatty acids (EPA and DHA) support cardiovascular health and may help reduce inflammation associated with obesity [4]. As Mounjaro patients often reduce their intake of fatty fish, a daily omega-3 supplement providing 1000-2000mg combined EPA/DHA is advisable. Look for products certified for purity and sustainability.

Vitamins A, E, and K are fat-soluble vitamins that require dietary fat for absorption. The appetite suppression and reduced fat intake common on Mounjaro can compromise absorption of these nutrients. A comprehensive multivitamin containing the recommended daily amounts of vitamins A (700-900mcg), E (15mg), and K (90-120mcg) provides baseline coverage, though vitamin K supplementation should be avoided by patients on anticoagulant medications without prescriber approval.

Timing Fat-Soluble Vitamins with Meals

To optimise absorption, take fat-soluble vitamins (A, D, E, K) with your largest meal of the day, even if that meal is smaller than pre-Mounjaro. The small amount of dietary fat present will enhance absorption. Water-soluble vitamins (B-complex, vitamin C) can be taken at any time, though spreading them throughout the day may reduce the risk of nausea in sensitive individuals.

Vitamin C, Zinc, and Immune Support

Vitamin C supports collagen synthesis, which becomes particularly important during weight loss when skin elasticity is challenged. A daily intake of 500-1000mg vitamin C may support skin health and wound healing. Zinc plays crucial roles in immune function and protein synthesis, with 15-30mg daily recommended for adults losing significant weight [2].

Some patients report increased susceptibility to minor infections during the initial months of Mounjaro treatment, possibly related to the metabolic stress of rapid weight loss. While evidence is limited, maintaining adequate vitamin C and zinc status through supplementation may support immune resilience. However, mega-doses exceeding recommended amounts offer no additional benefit and may cause adverse effects.

Choosing Quality Supplements and Monitoring Your Nutritional Status

Not all vitamin supplements are created equal. In the UK, look for products manufactured to GMP (Good Manufacturing Practice) standards and third-party tested for purity. Avoid proprietary blends that don't disclose individual ingredient amounts, and be wary of supplements making exaggerated weight loss claims — vitamins support health but don't independently drive fat loss.

We recommend patients on Mounjaro have baseline blood tests before starting treatment and follow-up testing at 3-6 months to assess vitamin B12, vitamin D, folate, iron, and calcium levels. Your GP can arrange these tests through the NHS, or private testing is available. This objective data allows your prescriber to tailor supplementation to your individual needs rather than relying on generic recommendations.

At Cured Pharmacy, our superintendent pharmacist Tarun Kumar and clinical team provide personalised guidance on vitamin supplementation as part of your Mounjaro treatment plan. All Mounjaro prescriptions require an online clinical assessment by a UK-registered prescriber, during which nutritional support is discussed. You can start your free consultation today through our weight loss treatment pathway.

When to Seek Professional Advice

Contact your prescriber if you experience persistent fatigue, unusual hair loss, muscle weakness, numbness or tingling, or any concerning symptoms during Mounjaro treatment. These may indicate nutritional deficiencies requiring targeted supplementation or dose adjustment. Never self-diagnose or take high-dose supplements without professional guidance, as some vitamins can cause toxicity at excessive levels.

Scientific References

  1. Jastreboff, A. M., Aronne, L. J., Ahmad, N. N., et al. (2022). Tirzepatide Once Weekly for the Treatment of Obesity. New England Journal of Medicine, 387(3), 205–216. https://doi.org/10.1056/NEJMoa2206038 [accessed 13 August 2026]
  2. Lupoli, R., Lembo, E., Saldalamacchia, G., et al. (2017). Bariatric surgery and long-term nutritional issues. World Journal of Diabetes, 8(11), 464–474. https://doi.org/10.4239/wjd.v8.i11.464 [accessed 13 August 2026]
  3. Shapses, S. A., & Sukumar, D. (2012). Bone metabolism in obesity and weight loss. Annual Review of Nutrition, 32, 287–309. https://doi.org/10.1146/annurev.nutr.012809.104655 [accessed 13 August 2026]
  4. Mechanick, J. I., Apovian, C., Brethauer, S., et al. (2020). Clinical Practice Guidelines for the Perioperative Nutrition, Metabolic, and Nonsurgical Support of Patients Undergoing Bariatric Procedures. Obesity, 28(4), O1–O58. https://doi.org/10.1002/oby.22719 [accessed 13 August 2026]
  5. NHS. (2026). Tirzepatide: a medicine to manage type 2 diabetes and treat obesity. https://www.nhs.uk/medicines/tirzepatide/ Accessed 13 August 2026.
  6. NHS. (2026). Overweight and obesity in adults. https://www.nhs.uk/conditions/overweight-and-obesity/ Accessed 13 August 2026.
  7. NHS England. (2026). Weight management injections. https://www.england.nhs.uk/ourwork/prevention/obesity/medicines-for-obesity/weight-management-injections/ Accessed 13 August 2026.

Information on this page is for educational purposes only and is not medical advice. All prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting any new medication or supplement regimen. Vitamin supplementation recommendations are general guidance and should be tailored to individual nutritional needs based on blood testing and professional assessment.

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Jane L.

"Brilliant. Lost 4 stone on mounjaro no side effects at all. Cured pharmacy are excellent. Always helpful pens sent out quickly always comes with needles and sterile wipes. If you want to go on GLP-1 go to cured pharmacy. So professional. Thank you cured pharmacy you changed my health and well being."

Ann-Marie

"I absolutely love this product, I have been using 2.5mg as maintenance dose and have managed to control my weight without any side effects and can still eat well balanced meals. The pharmacy is very efficient friendly and helpful I would not purchase from anywhere else."

Sacha W.

"So far I'm really impressed by my results it's crazy cause I'm not snacking like how I used to do and I see my face slimming down already and it's only been 2 and a half weeks. Can't wait to give my feedback in 5 months time thank you cured pharmacy."

Kimberly G.

"Mounjaro has corrected my hormonal weight gain during menopause. I am using it now to maintain that balance. The results for me have been exceptional!"

Jennifer

"Great really helps cure those nasty habits can't wait for my next mounjaro pen."

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Faq

What vitamins should I take on Mounjaro UK?
Most Mounjaro patients benefit from a high-quality multivitamin plus additional vitamin B12 (1000mcg), vitamin D3 (1000-2000 IU), and omega-3 fatty acids (1000-2000mg EPA/DHA). Individual needs vary based on dietary intake and blood test results, so consult your UK prescriber for personalised recommendations.
Can I take a standard multivitamin while on Mounjaro?
Yes, a comprehensive multivitamin provides baseline coverage of essential nutrients. However, Mounjaro patients often require additional B12 and vitamin D beyond standard multivitamin amounts due to reduced food intake and absorption changes associated with GLP-1 medications.
Do I need vitamin B12 injections on Mounjaro?
Most patients achieve adequate B12 levels with high-dose oral or sublingual supplements (1000mcg daily). Injections are typically reserved for patients with documented deficiency or absorption issues confirmed by blood testing, as determined by your UK prescriber.
When should I take vitamins with Mounjaro?
Take fat-soluble vitamins (A, D, E, K) with your largest meal to enhance absorption. Water-soluble vitamins (B-complex, C) can be taken any time, though some patients prefer taking them with food to minimise nausea during the initial Mounjaro titration period.
Will vitamins help with Mounjaro side effects?
Vitamins support overall health but don't directly reduce Mounjaro's gastrointestinal side effects like nausea or diarrhoea. However, preventing nutritional deficiencies can improve energy levels and reduce fatigue that some patients experience during treatment.
How much does Mounjaro cost at Cured Pharmacy?
Mounjaro Weight Loss Injections start from £124.99 at Cured Pharmacy, with transparent upfront pricing and no hidden fees. All prescriptions require a free online clinical assessment by a UK-registered prescriber, which takes under 3 minutes to complete.
Can I get vitamin deficiency blood tests on the NHS?
Yes, your GP can arrange NHS blood tests to check vitamin B12, folate, vitamin D, iron, and calcium levels. We recommend baseline testing before starting Mounjaro and follow-up testing at 3-6 months to monitor your nutritional status during treatment.
Are there any vitamins I should avoid on Mounjaro?
Avoid mega-dose supplements exceeding recommended daily amounts unless specifically advised by your prescriber. Patients on anticoagulants should not take vitamin K supplements without medical approval, and excessive vitamin A can cause toxicity. Always disclose all supplements during your clinical assessment.
What vitamins should I take while on Mounjaro in the UK?
Most Mounjaro users benefit from a daily multivitamin containing B vitamins, vitamin D, and magnesium to support energy and digestion. Cured Pharmacy can provide personalised advice on the best vitamins to take on Mounjaro UK based on your health profile. Calcium and iron supplements may also be recommended if dietary intake is reduced.
Can taking vitamins reduce Mounjaro side effects?
Yes, certain vitamins can help manage common Mounjaro side effects like nausea and fatigue. B-complex vitamins support energy levels, while ginger supplements and vitamin B6 may ease digestive discomfort. Cured Pharmacy offers guidance on which vitamins to take on Mounjaro UK to optimise your treatment experience.
Do I need a separate prescription for vitamins with Mounjaro?
No, most vitamins are available over the counter and do not require a prescription when taking Mounjaro. Cured Pharmacy can recommend suitable vitamin supplements during your Mounjaro consultation to ensure safe and effective use. Always inform your prescriber of any supplements you plan to take alongside Mounjaro.
How soon should I start taking vitamins after beginning Mounjaro?
You can start taking vitamins immediately when beginning Mounjaro treatment to support your nutritional needs from day one. Starting a multivitamin early helps prevent deficiencies as your appetite and food intake may decrease. Cured Pharmacy provides clear guidance on the best vitamins to take on Mounjaro UK as part of your treatment plan.
Are there any vitamins I should avoid while taking Mounjaro?
There are no vitamins that directly interact negatively with Mounjaro, but high-dose supplements should be discussed with your prescriber first. Fat-soluble vitamins like A, D, E, and K should be taken in appropriate doses to avoid toxicity. Cured Pharmacy ensures you receive safe recommendations for vitamins to take on Mounjaro UK tailored to your individual needs.
Tarun Kumar, Prescribing Pharmacist

Medically reviewed by

Tarun Kumar, Prescribing Pharmacist (GPhC 2233073)

Reviewed on: June 03, 2026

Last reviewed: 13 August 2026

Last updated on 13 August 2026.

Review History

Our experts continually monitor new findings in health and medicine, and we update our articles when new information becomes available.

Why this page was updated on 13 August 2026

Content checked and updated as part of our periodic review, to ensure accuracy and currentness.

Current version (13 August 2026)

Edited by: The Editorial Team

Medically reviewed by:

Tarun Kumar, GPhC No. 2233073, Prescribing Pharmacist


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