Best Multivitamin with Lansoprazole

Jul 8, 2026

Quick Answer

Yes, most people can safely take a multivitamin with lansoprazole.

If you're taking lansoprazole long term, it's worth paying closer attention to your nutritional intake. Like other proton pump inhibitors (PPIs), lansoprazole reduces the amount of acid your stomach produces. Over time, this may reduce the absorption of certain nutrients in some people, particularly vitamin B12, magnesium, iron and calcium.

A multivitamin isn't essential for everyone taking lansoprazole, but if you decide to take one, choosing a well-formulated product is important. The quality of the ingredients and the way the nutrients are formulated can make a significant difference.

Pharmacist's Verdict


Can I take a multivitamin with lansoprazole?	✅ Yes
Can lansoprazole affect nutrient absorption?	✅ Long-term use may affect vitamin B12, magnesium, iron and calcium in some people.
Should I choose any multivitamin?	Look for a well-formulated product using high-quality, bioavailable ingredients.
Should I stop taking lansoprazole because of this?	❌ No. Continue taking it as prescribed and speak to your GP or pharmacist if you have concerns.

Diagram 1: How lansoprazole reduces stomach acid and why this may influence the absorption of vitamin B12, magnesium, iron and calcium.

In This Guide

Can you safely take a multivitamin with lansoprazole?
Which vitamins and minerals are most commonly affected?
How to choose a high-quality multivitamin.
When a dedicated magnesium supplement may be worth considering.
Which Arbor supplements may be most suitable depending on your nutritional goals.

Why Can Lansoprazole Affect Vitamin and Mineral Absorption?

Lansoprazole belongs to a group of medicines called proton pump inhibitors (PPIs). It works by reducing the amount of acid your stomach produces, helping to treat acid reflux, stomach ulcers and gastro-oesophageal reflux disease (GORD).

Although stomach acid is often associated with digestion, it also helps release certain vitamins and minerals from food before they're absorbed by your body.

When stomach acid is reduced over a prolonged period, the absorption of some nutrients may become less efficient in some people. The nutrients most commonly discussed in relation to long-term PPI use are:

Vitamin B12
Magnesium
Iron
Calcium

For most people, the benefits of taking lansoprazole outweigh the potential nutritional risks. However, if you're taking it long term, it's sensible to maintain a balanced diet and consider whether your overall nutritional intake is meeting your needs.

Table 2: Nutrients Commonly Discussed During Long-Term Lansoprazole Use

Nutrient	Why it's discussed
Vitamin B12	Stomach acid helps release vitamin B12 from food before it's absorbed.
Magnesium	Long-term PPI use has been associated with low magnesium levels in a small number of people.
Iron	Reduced stomach acid may make dietary iron harder to absorb in some individuals.
Calcium	Some evidence suggests calcium absorption may be reduced during long-term treatment.

Which Vitamins and Minerals Are Most Commonly Affected?

Magnesium

Low magnesium is an uncommon but recognised side effect of long-term proton pump inhibitor (PPI) treatment.

Magnesium supports normal muscle function, nervous system function, psychological function, energy metabolism and helps reduce tiredness and fatigue.

If you've been taking lansoprazole for a prolonged period and are concerned about your magnesium intake, speak to your GP or pharmacist before starting supplementation.

Recommended Arbor Products

➡️ Magnesium Complex – A dedicated magnesium supplement containing magnesium bisglycinate and magnesium taurate.

➡️ TRINITY – Provides magnesium as part of a comprehensive daily multivitamin.

Vitamin B12

Vitamin B12 has the strongest evidence linking it to long-term PPI use.

Stomach acid helps release vitamin B12 from food before it's absorbed in the small intestine. As lansoprazole reduces stomach acid production, this process may become less efficient over time in some people.

Possible symptoms of vitamin B12 deficiency include:

Tiredness or fatigue
Pins and needles
Poor memory or concentration
Weakness
A sore tongue

If you're concerned about your vitamin B12 levels, speak to your GP or pharmacist, who can advise whether further investigation is needed.

Recommended Arbor Products

➡️ TRINITY – A comprehensive daily multivitamin providing vitamin B12 as methylcobalamin.

Iron

Reduced stomach acid may make dietary iron harder to absorb in some individuals.

Most people taking lansoprazole continue to maintain healthy iron levels, particularly if they eat a balanced diet. However, if you have low iron stores or are at increased risk of iron deficiency, it's worth discussing this with your healthcare professional.

Recommended Arbor Products

➡️ TRINITY – Contains ferrous bisglycinate paired with vitamin C.

Calcium

Calcium is another nutrient that's been studied in relation to long-term PPI use.

Although the evidence is mixed, maintaining adequate calcium intake remains important for supporting normal bone health.

Recommended Arbor Products

➡️ TRINITY – Contains calcium alongside vitamin D3 and vitamin K2.

Table 3: Vitamins and Minerals Commonly Discussed During Long-Term Lansoprazole Use

Nutrient	Why it's important
Magnesium	Supports muscles, the nervous system and energy metabolism.
Vitamin B12	Supports normal nervous system function, energy metabolism and red blood cell formation.
Iron	Helps reduce tiredness and fatigue and supports normal oxygen transport.
Calcium	Supports the maintenance of normal bones and teeth.

What Should You Look for in a Multivitamin?

If you're taking lansoprazole, the best multivitamin isn't necessarily the one with the longest ingredient list—it's the one that's been formulated with quality and absorption in mind.

When comparing multivitamins, look for:

Bioavailable nutrient forms that are easier for your body to absorb and use.
Thoughtful formulation, with nutrients paired appropriately rather than simply packed into a single tablet.
Balanced nutrient levels without relying on excessive doses.
Clean ingredients, avoiding unnecessary fillers where possible.

Table 4: Choosing a High-Quality Multivitamin

What to look for	Why it matters
Bioavailable ingredients	The form of a nutrient can influence how well it's absorbed and utilised.
Thoughtful formulation	Some nutrients work well together, while others can compete for absorption.
Balanced nutrient levels	More isn't always better—a well-designed formulation focuses on quality, not just quantity.
Clean formulation	Fewer unnecessary ingredients means a greater focus on the nutrients that matter.

Why We Formulated TRINITY Differently

As clinical pharmacists, we wanted to create a multivitamin that reflected how nutrients work together in the body.

Instead of combining every ingredient into a single tablet, TRINITY is divided into Morning, Day and Night formulations. This allows us to:

Pair nutrients that work well together.
Separate nutrients that may compete for absorption.
Use premium, bioavailable forms of vitamins and minerals throughout the formula.
Deliver comprehensive nutritional support across the day.

Whether you're taking lansoprazole or not, we believe the quality of a multivitamin is just as important as the nutrients it contains.

Recommended Product

➡️ TRINITY – A pharmacist-formulated multivitamin designed to provide comprehensive daily nutritional support using premium ingredients and thoughtful nutrient timing.

Taking Lansoprazole Long Term: 5 Things to Keep in Mind

If you've been taking lansoprazole for several months or years, these simple steps can help support your overall health and nutritional wellbeing.

1. Continue Taking Lansoprazole as Prescribed

Lansoprazole is an effective treatment for acid reflux, stomach ulcers and GORD. Don't stop taking it without speaking to your GP or pharmacist.

2. Eat a Balanced Diet

Aim to include a variety of foods naturally rich in vitamin B12, magnesium, iron and calcium as part of a healthy, balanced diet.

3. Review Your Medication Regularly

Some people need lansoprazole long term, while others may only need it for a shorter period. Regular medication reviews help ensure you're taking the right medicine at the right dose for the right length of time.

4. Choose Supplements Carefully

If you decide to take a multivitamin, focus on quality rather than quantity. A thoughtfully formulated supplement is likely to provide greater value than simply choosing the product with the longest ingredient list.

5. Speak to Your Healthcare Professional if You Have Concerns

If you're experiencing symptoms that could suggest a vitamin or mineral deficiency, or you're unsure whether supplementation is appropriate, speak to your GP or pharmacist before starting new supplements.

Table 5: Long-Term Lansoprazole Checklist

✔ Checklist
Continue taking your medication as prescribed	☐
Eat a balanced, varied diet	☐
Review your medication regularly	☐
Choose supplements carefully	☐
Seek advice if you have concerns	☐

Frequently Asked Questions

Can I take a multivitamin with lansoprazole?

Yes. Most people can safely take a multivitamin while taking lansoprazole. If you're taking lansoprazole long term, choosing a high-quality multivitamin may help support your overall nutritional intake.

Can I take vitamins at the same time as lansoprazole?

In most cases, yes. Lansoprazole is usually taken before food, while many multivitamins are best taken with a meal. Always follow the directions provided with both your medication and your supplement.

Does lansoprazole reduce vitamin absorption?

Long-term lansoprazole use has been associated with reduced absorption of certain nutrients in some people, particularly vitamin B12, magnesium, iron and calcium.

Which vitamins are affected by lansoprazole?

The nutrients most commonly discussed are:

Vitamin B12
Magnesium
Iron
Calcium

Not everyone taking lansoprazole will experience reduced absorption, and many people continue to meet their nutritional needs through a balanced diet.

Can I take magnesium with lansoprazole?

Yes. Magnesium supplements can generally be taken alongside lansoprazole. If you're concerned about your magnesium intake, speak to your GP or pharmacist before starting supplementation.

Can I take vitamin B12 with lansoprazole?

Yes. Vitamin B12 supplements can generally be taken with lansoprazole. If you have symptoms of a vitamin B12 deficiency, your GP or pharmacist may recommend further assessment.

Does lansoprazole affect iron absorption?

It may. Reduced stomach acid can make dietary iron harder to absorb in some people, although many people taking lansoprazole continue to maintain healthy iron levels.

Does lansoprazole affect calcium absorption?

Some studies suggest calcium absorption may be reduced during long-term treatment, although the evidence remains mixed.

What is the best multivitamin to take with lansoprazole?

Look for a multivitamin that uses high-quality, bioavailable ingredients and has been thoughtfully formulated rather than simply containing the highest number of ingredients.

Can I take TRINITY with lansoprazole?

For most people, yes. TRINITY can generally be taken alongside lansoprazole as part of a healthy, balanced lifestyle.

When should I speak to my GP or pharmacist?

Arrange a review if you've been taking lansoprazole long term, have concerns about your nutritional intake, think you may have developed a vitamin or mineral deficiency, or are unsure whether supplementation is appropriate for you.

References

This article has been medically reviewed using current clinical guidance and published evidence available at the time of writing.

British National Formulary (BNF). Lansoprazole.
National Institute for Health and Care Excellence (NICE). Gastro-oesophageal reflux disease and dyspepsia in adults: investigation and management.
NHS. Lansoprazole.
NHS. Vitamins and minerals.
Heidelbaugh JJ. Proton Pump Inhibitors and Risk of Vitamin and Mineral Deficiency: Evidence and Clinical Implications. Therapeutic Advances in Drug Safety.
Freedberg DE, Kim LS, Yang YX. The Risks and Benefits of Long-term Use of Proton Pump Inhibitors: Expert Review and Best Practice Advice. Gastroenterology.
European Food Safety Authority (EFSA). Authorised Health Claims for Vitamins and Minerals.