Magnesium: Price, Dosage & Where to Buy
Magnesium is listed here as a dietary supplement product. Recorded status: General sale list medicine (GSL).
This hub brings together the basic label facts, typical cost and purchase options in one place. Under UK rules, Magnesium does not require a prescription.
Market availability is not fixed, so the status section below reflects the latest data we have. Scroll down for strengths, region pages and common questions.
Facts
- Active ingredient
- magnesium
- General sale list medicine (GSL)
- Licensing status not on file
No generic version on file
No supply disruption currently listed (NHS SPS)
Magnesium price estimates, the UK-licensed equivalent
Estimate, not a quote
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48.6mg General sale list medicine (GSL) NHS SPS supply disruption listed
£88.93 per tablet or capsule
N/A
Price estimate
Where to buy -
84mg General sale list medicine (GSL) NHS SPS supply disruption listed
£180.51 per tablet or capsule
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Price estimate
Where to buy -
97.2mg General sale list medicine (GSL) NHS SPS supply disruption listed
£29.68 per tablet or capsule
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Price estimate
Where to buy -
97.2mg/5ml General sale list medicine (GSL) NHS SPS supply disruption listed
£99.53 per tablet or capsule
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Price estimate
Where to buy -
100mg General sale list medicine (GSL) NHS SPS supply disruption listed
£73.72 per tablet or capsule
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Price estimate
Where to buy -
121.25mg/5ml General sale list medicine (GSL) NHS SPS supply disruption listed
£119.89 per tablet or capsule
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Price estimate
Where to buy -
150mg General sale list medicine (GSL) NHS SPS supply disruption listed
£103.19 per tablet or capsule
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Price estimate
Where to buy -
160mg General sale list medicine (GSL) NHS SPS supply disruption listed
£87.11 per tablet or capsule
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Price estimate
Where to buy -
200mg General sale list medicine (GSL) NHS SPS supply disruption listed
£202.08 per tablet or capsule
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Price estimate
Where to buy -
250mg General sale list medicine (GSL) NHS SPS supply disruption listed
£51.77 per tablet or capsule
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Price estimate
Where to buy -
500mg General sale list medicine (GSL) NHS SPS supply disruption listed
£114.10 per tablet or capsule
N/A
Price estimate
Where to buy
All forms and prices
| Forms | Price per unit |
|---|---|
| 48.6mg | £88.93 / tablet or capsule |
| 84mg | £180.51 / tablet or capsule |
| 97.2mg | £29.68 / tablet or capsule |
| 97.2mg/5ml | £99.53 / tablet or capsule |
| 100mg | £73.72 / tablet or capsule |
| 121.25mg/5ml | £119.89 / tablet or capsule |
| 150mg | £103.19 / tablet or capsule |
| 160mg | £87.11 / tablet or capsule |
| 200mg | £202.08 / tablet or capsule |
| 250mg | £51.77 / tablet or capsule |
| 500mg | £114.10 / tablet or capsule |
as of Jul 1, 2026 · Pricing methodology
Prices shown here are an estimate, built from public UK pricing data, not a price any one pharmacy has promised. Actual prices vary by pharmacy, pack and location, so treat the numbers as a starting point, not a promise. A price well below the listed range should raise a red flag about the seller's license.
This product is sold as a food supplement. Food supplements are not assessed by the MHRA for safety or effectiveness before they reach the market, and they are not intended to treat or prevent any disease.
This product is sold as a food supplement. It has not been assessed by the MHRA and is not intended to treat or prevent any disease.
About Magnesium
Magnesium is a dietary supplement containing the mineral magnesium. Magnesium contributes to normal muscle and nerve function, energy release and electrolyte balance.
This product page offers general reference information about magnesium as a food supplement. It is not a licensed medicine, and suitability can vary between individuals.
How Magnesium works
Magnesium is a mineral used by the body in many normal processes. It helps support normal nerve signalling and muscle movement. It also contributes to the release of energy from food and helps maintain electrolyte balance.
Magnesium works alongside other minerals and nutrients, rather than acting as a medicine. The form and amount of magnesium can affect how much is absorbed and how well it is tolerated. Product-specific serving details should be checked on the packaging.
What Magnesium is used for
Magnesium supplements are commonly used to support the body's normal magnesium intake. Magnesium has roles in normal muscle function, nerve function, energy release and electrolyte balance. It may be considered when dietary intake is low or when extra magnesium is being discussed with a healthcare professional.
This supplement is a food product rather than a medicine. Individual needs can vary, and a pharmacist or doctor can help decide whether a magnesium supplement is suitable.
Key warnings
- This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
- Check with a doctor or pharmacist before use if there is a medical condition or regular medicine use.
- Excess magnesium from supplements may cause loose stools, nausea or stomach discomfort.
- Stop using the product and seek professional advice if an unexpected reaction occurs.
Dosage from the label
The label lists no serving size for this product. It also lists no strength or available form.
This information is not a dosing instruction. The packaging should be checked for current serving details before use, and a pharmacist can help explain the product information if anything is unclear.
Main interactions
- Magnesium supplements can reduce the absorption of some medicines when taken at the same time.
- Ask a pharmacist about spacing magnesium from antibiotics or thyroid medicines.
- Other supplements containing magnesium can increase total intake and the chance of stomach effects.
- Medicines or products that affect kidney function may require professional advice before magnesium use.
Storage
Keep the product in its original container, closed and away from heat, moisture and direct sunlight. Store out of the reach of children. Follow any storage directions printed on the packaging to maintain quality.
Missed dose
If a daily serving is missed, do not add extra servings to compensate. Follow the product packaging when the next serving is due, or ask a pharmacist for advice. Since no serving size is listed for this product, professional guidance is appropriate if the intended schedule is unclear.
Pregnancy and breastfeeding
Anyone who is pregnant or breastfeeding should ask a doctor or pharmacist before using a magnesium supplement. Individual nutritional needs can vary during pregnancy and breastfeeding. A healthcare professional can review the product and any other supplements or medicines being used.
Pharmacies by area for Magnesium (UK-licensed equivalent)
- North East · 884 pharmacies
- North West · 2538 pharmacies
- Yorkshire and The Humber · 1676 pharmacies
- East Midlands · 1307 pharmacies
- West Midlands · 1778 pharmacies
- East of England · 1860 pharmacies
- London · 3261 pharmacies
- South East · 2368 pharmacies
- South West · 1374 pharmacies
- Northern Ireland · 714 pharmacies
- Scotland · 1725 pharmacies
- Wales · 1050 pharmacies
Pharmacies near you
Use your location to open the pharmacies closest to you and ask them about Magnesium, the UK-licensed medicine with the same active ingredient.
Cities with the most pharmacies
- London · 724 pharmacies
- Birmingham · 265 pharmacies
- Nottingham · 180 pharmacies
- Glasgow · 177 pharmacies
- Leeds · 173 pharmacies
- Sheffield · 162 pharmacies
- Bristol · 148 pharmacies
- City of London · 144 pharmacies
- Manchester · 134 pharmacies
- Edinburgh · 131 pharmacies
- Bolton · 124 pharmacies
- Belfast · 122 pharmacies
- Hampstead · 121 pharmacies
- Coventry · 115 pharmacies
- Cardiff · 112 pharmacies
Related medicines
Frequently asked questions
What is magnesium used for?
Magnesium is a dietary supplement containing the mineral magnesium. It is commonly used to support normal muscle and nerve function, energy release and electrolyte balance.
Who should check with a doctor or pharmacist before using magnesium?
Anyone who is pregnant or breastfeeding should ask a doctor or pharmacist before use. People with a medical condition or regular medicine use should also seek professional advice.
Does this product have a listed serving size or strength?
No serving size is listed for this product. No strength or available form is listed either.
What is Magnesium?
Magnesium is a dietary supplement covered by this page. Current status: General sale list medicine (GSL).
How is Magnesium grouped on this site?
Magnesium is cataloged under Vitamins & Supplements. Grouping helps compare related dietary supplements.
Is a prescription required for Magnesium?
No: Magnesium is sold over the counter in the UK.
First published October 2, 2026 · Last updated · Report an error on this page