Price: £50
Turnaround: 12 hours
Appointment: 50 minutes
General Health
How to Book a Same-Day Private GP Appointment in London
It’s common to need a GP appointment at short notice. Health concerns don’t always follow a schedule, and symptoms can
May 12, 2026
A magnesium blood test measures the amount of magnesium in your blood. It is an important test as magnesium plays a vital role in numerous bodily functions, including muscle and nerve function, blood sugar regulation, and bone health.
This test, offered by our London-based clinics, helps detect magnesium deficiencies or excesses that could impact your overall well-being.
Magnesium is a vital mineral that is found in your blood. It is important for many bodily functions, and your magnesium levels help indicate the status of numerous bodily functions. Some of these functions include muscle and nerve function, blood sugar regulation, and bone health.
A magnesium Blood Test also helps detect magnesium deficiencies or excesses that could impact your overall well-being.
Magnesium imbalances can impact your overall health. Common reasons to check magnesium levels include:
A magnesium blood test is particularly beneficial for individuals experiencing symptoms or managing specific health conditions:
Use our online booking engine or book your test by giving us a call.
On the online booking engine select the “appointment type” you need.
You will be seen by one of our friendly phlebotomists or trained clinicians.
Do not forget to inform your City Walk-In Clinic doctor about any medications, supplements, or vitamins you take, especially magnesium supplements, as they may affect results. Avoid taking magnesium-containing supplements for 24 hours before the test unless instructed otherwise.
One of our incredible City Walk-In Clinic healthcare professionals will clean an area of your arm with an antiseptic. A small needle will be used to draw blood from a vein, usually in the inner elbow. The procedure is quick, typically lasting less than 5 minutes.
It is normal to experience mild soreness or bruising at the puncture site. Apply a cold pack if needed. As soon as your results are ready, our healthcare professional will be in contact to discuss them with you.
No
Hidden Charges
Transparent fees. The price you see is the price you pay.
No GP consultation
needed
No GP appointment requirement for blood tests
Established
since 1998
Experienced doctors & a professional team.
Strictly
confidential
Your medical records are kept private at all times.
We offer a wide range of private blood tests in London. Same-day appointments are available 5 days a week.
We work with experienced consultants & healthcare professionals who have received positive feedback from our patients, and with whom we have established long-term relationships.
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