# Cheapest magnesium

The cheapest magnesium now costs £1.85 per 100 capsules, the lowest of 232 products from 15 stores. Scanned again every day.

The first 10 of the ranking, updated 5 November 2026

| Product | Store | Per 100 capsules | Total |
| --- | --- | --- | --- |
| [Calcium & Magnesium Tablets](https://supplementscanner.co.uk/p/myvitamins-calcium-magnesium-tablets-125972) | Myprotein | £1.85 per 100 capsules | £5.00 |
| [New Era No.8 Mag Phos - 240 Tablets](https://supplementscanner.co.uk/p/new-era-new-era-no8-mag-phos-240-tablets-144775) | Vitamin Planet | £3.55 per 100 capsules | £8.52 |
| [Calcium & Magnesium Tablets](https://supplementscanner.co.uk/p/myvitamins-calcium-magnesium-tablets-125605) | Myvitamins | £3.56 per 100 capsules | £9.60 |
| [Zinc & Magnesium Capsules](https://supplementscanner.co.uk/p/myvitamins-zinc-magnesium-capsules-125572) | Myprotein | £3.70 per 100 capsules | £10.00 |
| [Magnesium Tablets](https://supplementscanner.co.uk/p/myvitamins-magnesium-tablets-125639) | Myvitamins | £4.67 per 100 capsules | £4.20 |
| [Magnesium Tablets 200mg](https://supplementscanner.co.uk/p/simply-supplements-magnesium-tablets-200mg-133558) | Simply Supplements | £5.36 per 100 capsules | £19.29 |
| [Essential Magnesium Tablets](https://supplementscanner.co.uk/p/myvitamins-essential-magnesium-tablets-126010) | Myprotein | £5.56 per 100 capsules | £5.00 |
| [Magnesium Glycinate 3-in-1 Capsules \| 2398mg](https://supplementscanner.co.uk/p/myprotein-magnesium-glycinate-3-in-1-capsules-2398mg-128118) | Myprotein | £5.56 per 100 capsules | £5.00 |
| [Spring Valley Calcium Magnesium & Zinc Plus Vitamin D3 Coated Caplets 250 Count](https://supplementscanner.co.uk/p/spring-valley-calcium-magnesium-zinc-plus-vitamin-d3-coated-caplets-250-count-215718) | Discount Health Products | £6.00 per 100 capsules | £14.99 |
| [Spring Valley Calcium Magnesium & Zinc Plus Vitamin D3 Coated Caplets 250 Count](https://supplementscanner.co.uk/p/spring-valley-calcium-magnesium-zinc-plus-vitamin-d3-coated-caplets-250-count-215480) | SleepAids | £6.40 per 100 capsules | £15.99 |

## Frequently asked questions

### What is the cheapest magnesium right now?

The lowest price is now £1.85 per 100 capsules, for Calcium & Magnesium Tablets at Myprotein. 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 232 products from 15 stores. Our scanner keeps re-reading the whole market, so new products and price changes appear automatically.

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Source: Supplementscanner, https://supplementscanner.co.uk/category/magnesium (live prices per product)