Magnesium (Serum)
Measures magnesium levels essential for muscle function, energy, and nerve health. Low levels can cause cramps, fatigue, or poor sleep. A helpful check if you’re feeling run down.
- Description
- Why This Test?
- Associated Conditions
The Magnesium (Serum) blood test measures the level of magnesium in your bloodstream. Magnesium is an essential mineral involved in muscle function, nerve signalling, energy production, and electrolyte balance.
Magnesium deficiency is relatively common and can develop gradually, particularly in people with increased physical demands, dietary insufficiency, or certain medical conditions. This test provides a reliable way to assess magnesium status and support appropriate dietary or supplementation decisions.
Magnesium plays a role in hundreds of biochemical reactions in the body and is essential for:
- Normal muscle contraction and relaxation
- Nerve function and signal transmission
- Energy production and fatigue prevention
- Heart rhythm stability
- Bone and mineral balance
Low magnesium levels may contribute to muscle cramps, twitching, fatigue, headaches, sleep disturbance, palpitations, or poor exercise recovery. Deficiency may be more likely in people who exercise regularly, experience chronic stress, consume alcohol, or take certain medications.
Blood testing helps identify low or imbalanced magnesium levels and supports targeted nutritional intervention.
Magnesium Deficiency
Low magnesium levels that may affect muscle, nerve, and cardiovascular function.
Muscle Cramps and Spasms
Electrolyte imbalance that may contribute to muscle twitching or cramping.
Fatigue and Low Energy
Reduced cellular energy production linked to inadequate magnesium availability.
Electrolyte Imbalance
Disruption in mineral balance affecting muscle and nerve activity.
What We Test
Biomarkers analysed by accredited UK laboratories
Biomarker Tested
Mineral
- Magnesium (Serum)
In-Clinic Blood Testing At Longridge, Preston
If you’d rather leave everything to a qualified professional, our in-clinic blood testing service is the most comfortable and hands-off experience. Once you complete your order, we’ll contact you to arrange a convenient appointment time.
Your sample will be taken by a trained phlebotomist, making the process quick, smooth, and reassuring - especially if you’re nervous around blood or struggle with finger-prick tests.
We send off all samples the same day to the lab to be processed so results can be expected within 72 hours.
Why Use This Service:
Hands-off, professional experience
High-quality samples for complex tests
No risk of “not enough sample”
Support at every step
No posting or packaging required
Convinient appointment times
Taking Charge Of Your Own Health Has Never Been Easier
Worried about your wellbeing?
If you’re experiencing unexplained symptoms such as fatigue, weight loss, or other issues, a comprehensive blood test may be the key to discovering potential underlying health problems.
Need to monitor a health condition?
Blood tests offer essential insights into various aspects of your health, from detecting deficiencies to evaluating immune functions.
Enhancing Performance and Fitness?
Whether you’re training for a sport or keeping track of your fitness progress, a blood test serves as an excellent foundation for your performance improvement journey.
All Our Tests Include:
No GP Referral
Order directly - no waiting for appointments
Fast Results
Detailed analysis within 72 hours
Doctor's Commentary
Expert interpretation of your results included
Secure & Confidential
Discreet service and consultations
Frequently Asked Questions
- Qualified Pharmacists
- Flexible Appointments
- Top Customer Service
How accurate are home finger-prick tests compared to clinic tests?
Our home finger-prick tests use the same accredited laboratories as our clinic tests. While clinic tests allow for more comprehensive panels, home tests are highly accurate for the parameters they measure.
Do I need a GP referral for a blood test?
No, you don’t need a GP referral. You can book directly with us for any blood test. We are a private clinic offering direct access to comprehensive blood testing.
How old do I have to be to have a blood test?
We will only draw blood from those aged 16 and above due to legal requirements.
How long does it take for the blood test results to come?
If you have used our clinic to complete a blood test, we send off all samples the same day to the lab to be processed. If you have used a home test kit, then once your sample has been sent off the lab will analyse your sample. Results are usually received within 72 hours.
How do I perform the home finger-prick test?
Your home blood test kit will contain easy-to-follow instructions on how to take your own finger blood sample. If you have any concerns or questions prior to using the kit, please contact our phlebotomists who will be happy to assist.
How do I prepare for a blood test?
There is no preparation required prior to taking any of the blood tests. Please simply remember to stay hydrated prior to your appointment. This is to help your veins dilate better to enable a quick and efficient blood sample to be taken and reduce the risks of feeling faint following your blood test.
Please inform the phlebotomist before your test if you are currently taking any blood thinning medication.
Should I fast before my blood test?
Fasting is not required for most blood tests. However, if your profile includes cholesterol tests and you’ve previously had high levels, consider fasting for 8 hours beforehand. While not essential, fasting can provide more accurate results.
Note: Fasting means abstaining from any food and drink, except for water.