Prices include VAT and exclude shipping. Price per capsule makes products of different sizes truly comparable.
Some links on this page are affiliate links: if you buy through one, we earn a commission. This does not affect our price comparison. We always show the lowest price per unit.
Frequently asked questions
What is the cheapest magnesium right now?
The lowest price is now £0.04 per capsule, for New Era No.8 Mag Phos - 240 Tablets at Vitamin Planet. Our scanner checks prices daily, so the ranking on this page is up to date.
Why do we compare magnesium per capsule?
Bottles differ in capsule count and dosage, so only the price per capsule shows what you really pay. We convert every price to the same unit, so you're comparing like with like.
How many stores are scanned for magnesium?
This comparison currently includes 90 products from 12 stores. Our scanner keeps re-reading the whole market, so new products and price changes appear automatically.
Vitamin Planet
![Calcium 400mg & Magnesium 200mg Tablets – 180 tablets / [Multibuy 1]](https://cdn.shopify.com/s/files/1/1037/8723/3629/files/Calcium-400mg-Magnesium-200mg-Tablets-Front-Label.jpg?v=1774361772&width=128)
![Chewable Calcium & Magnesium Tablets – 120 tablets / [Multibuy 1]](https://cdn.shopify.com/s/files/1/1037/8723/3629/files/Chewable-Calcium-Magnesium-Tablets-front-label.jpg?v=1773395866&width=128)
![Super Magnesium 250mg with Vitamin B Complex – 120 tablets / [Multibuy 1]](https://cdn.shopify.com/s/files/1/1037/8723/3629/files/Super-Magnesium-250mg-with-Vitamin-B-Complex-Front-Label.jpg?v=1774015496&width=128)
Simply Supplements
![Magnesium Triple Complex – 120 Capsules / [Multibuy 1]](https://cdn.shopify.com/s/files/1/1037/8723/3629/files/Magnesium-Triple-Complex.jpg?v=1780043971&width=128)
![Magnesium Bisglycinate 1500mg – 120 capsules / [Multibuy 1]](https://cdn.shopify.com/s/files/1/1037/8723/3629/files/Magnesium-Bisglycinate-1500mg-Front-Label1.jpg?v=1781090053&width=128)
![Magnesium Citrate Tablets 700mg – 120 tablets / [Multibuy 1]](https://cdn.shopify.com/s/files/1/1037/8723/3629/files/Magnesium-Citrate-Tablets-700mg-Front-Label.jpg?v=1774440799&width=128)
