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Closely matches the cheapest magnesium test on the market
Checks serum magnesium levels, a mineral linked to fatigue, muscle cramps and weakness when low.
Pricier than two peers, cheaper than whole-blood option
Measures serum magnesium, a mineral involved in muscle function, nerve signalling and heart health. Suited to people with fatigue, cramps or low energy who want to check whether low magnesium could be a factor.
Cheapest single-marker magnesium test we compare
A single-marker blood test that measures your serum magnesium level, suited to anyone who wants to check this one mineral rather than a full panel.
Priciest magnesium test in this group by some margin
This is a single blood test for magnesium, measured in whole blood rather than serum, which can give a more complete picture of the body's total magnesium level. It suits people who want the whole blood method specifically, rather than the more common serum test.
Compare magnesium test tests feature by feature across all providers.
| Feature | Blue Horizon Medicals Magnesium (Serum) | Medichecks Magnesium (serum) Blood Test | Forth Magnesium (MG) Home Blood Test Kit | Blue Horizon Medicals Whole Blood Magnesium |
|---|---|---|---|---|
| Compare Health Test score | 79.9 /10 Closely matches the cheapest magnesium test on the market | 77.1 /10 Pricier than two peers, cheaper than whole-blood option | 76.9 /10 Cheapest single-marker magnesium test we compare | 66.5 /10 Priciest magnesium test in this group by some margin |
| Price | £45.25 | £55.00 | £45.00 | £136.25 |
| Biomarkers Count | 1 | 1 | 1 | 1 |
| At Home | ||||
| Doctor Reviewed | ||||
| Turnaround Min Days | 1 days | 3 days | 2 days | 10 days |
| Turnaround Max Days | 1 days | 3 days | 2 days | 10 days |
| Sample Type | Blood | Blood | Blood | Blood |
| Collection Model | At-home finger-prick or Tasso autodraw or venous draw at clinic or nurse home visit | At-home finger-prick or in-store clinic or home nurse visit or venous draw at clinic | At-home finger-prick kit or at-home AutoDraw device or home nurse visit | Venous draw at clinic or nurse home visit |
| Gender Focus | Both | Both | Both | Both |
| Subscription Available | ||||
| href="https://www.bluehorizonbloodtests.co.uk/products/magnesium-serum" class="btn btn--primary btn--sm" rel="nofollow noopener sponsored" target="_blank" aria-label="Buy Magnesium (Serum)" > Buy now Full review | href="https://www.medichecks.com/discount/PROJECTSCREEN10?redirect=%2Fproducts%2Fmagnesium-serum-blood-test&ref=superfiliate-PROJECTSCREEN10&utm_source=superfiliate&utm_campaign=PROJECTSCREEN10&utm_medium=organic" class="btn btn--primary btn--sm" rel="nofollow noopener sponsored" target="_blank" aria-label="Buy Magnesium (serum) Blood Test" > Buy now Full review | href="https://www.forthwithlife.co.uk/products/magnesium-home-blood-test-kit/" class="btn btn--primary btn--sm" rel="nofollow noopener sponsored" target="_blank" aria-label="Buy Magnesium (MG) Home Blood Test Kit" > Buy now Full review | href="https://www.bluehorizonbloodtests.co.uk/products/whole-blood-magnesium" class="btn btn--primary btn--sm" rel="nofollow noopener sponsored" target="_blank" aria-label="Buy Whole Blood Magnesium" > Buy now Full review |
Our editorial team independently evaluates each test in this group using our structured scoring framework. Scores reflect accuracy, clinical credibility, value for money, turnaround time and reporting quality. Prices are updated regularly from provider listings. We may earn a commission if you purchase through our links — this never influences our rankings or scores.
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