Weight Loss Blood Tests to Safely Monitor Your Treatment
Specialist blood tests for patients on Mounjaro, Wegovy and other weight loss treatments. Designed around MHRA monitoring guidance, from our clinic in Longridge, Lancashire.
Weight loss medications like Mounjaro® and Wegovy® are among the most effective treatments available, but like any long-term medication, they affect how your body processes food, regulates hormones and manages waste. Monitoring a small set of key blood markers before and during treatment is the single most effective way to catch any issues early and get the most out of your treatment plan.
At Longridge Travel Health Clinic, we offer three tiered weight loss blood test profiles designed to give you and your clinician the information you need, from a simple baseline check before your first injection, right through to advanced monitoring for patients on higher doses. All three tests are processed by our UK laboratory partners with results typically back within 1 working day.
Four clinical areas worth monitoring on GLP-1 treatment
GLP-1 medications work by acting on the pancreas, digestive system and appetite-regulating areas of the brain. Because they affect so many systems at once, a handful of blood markers can reveal how well your body is coping with treatment and whether your dose needs to be adjusted.
Pancreatic function
Pancreatitis is a rare but recognised risk of GLP-1 treatment. Lipase and amylase are the two enzymes that reveal pancreatic inflammation early, often before symptoms become severe.
Liver & kidney function
Rapid weight loss, changes in diet, and the medication itself can all place extra demand on your liver and kidneys. ALT, AST, GGT, creatinine and eGFR are the key markers.
Metabolic health
HbA1c shows how your long-term blood sugar is responding to treatment, and a full lipid profile reveals whether your cardiovascular risk is improving as you lose weight.
Thyroid & nutrition
An underactive thyroid can be a hidden reason weight loss stalls. On higher doses and longer treatment courses, vitamin D, B12 and iron status also matter - deficiencies here are a common cause of fatigue that can easily be mistaken for a side effect.
Our Weight Loss Blood Tests
Every test is processed by our UK lab partners with a 3-day turnaround and includes a clinical review of your results.
Amylase
This test measures the amylase enzyme to assess pancreatic health. It’s helpful if you’re experiencing abdominal pain, nausea, or digestive...
Digestive Enzymes
- Amylase
Lipase
This test measures the Lipase enzyme to assess pancreatic health. It’s helpful if you’re experiencing abdominal pain, nausea, or digestive...
Digestive Enzymes
- Lipase
Weight Loss Management
A focused blood test to support weight-loss treatment, assessing cholesterol, blood sugar, liver, kidney, and pancreatic health in 20 key...
Lipid Profile
- Total Cholesterol
- Low Density Lipoprotein (LDL) Cholesterol
- High-Density Lipoprotein (HDL) Cholesterol
- HDL Percentage
- Triglycerides
Diabetes & Metabolic Health
- HbA1c (Glycosylated Haemoglobin)
Liver Function
- Alanine Transaminase (ALT)
- Aspartate Aminotransferase (AST)
- Gamma Glutamyl Transferase (GGT)
- Alkaline Phosphatase (ALP)
- Total Bilirubin
- Albumin
- Globulin
- Total Protein
Kidney Function
- Creatinine
- Urea
- Estimated Glomerular Filtration Rate (eGFR)
- Sodium
Pancreatic Markers
- Lipase
- Amylase
Weight Loss Management + Thyroid
A 22-marker weight-loss blood test that includes full thyroid function, ideal for ruling out underactive thyroid as a factor in...
Lipid Profile
- Total Cholesterol
- Low Density Lipoprotein (LDL) Cholesterol
- High-Density Lipoprotein (HDL) Cholesterol
- HDL Percentage
- Triglycerides
Diabetes & Metabolic Health
- HbA1c (Glycosylated Haemoglobin)
Thyroid Function
- Thyroid Stimulating (TSH)
- Free T4 (Thyroxine)
Liver Function
- Alanine Transaminase (ALT)
- Aspartate Aminotransferase (AST)
- Gamma Glutamyl Transferase (GGT)
- Alkaline Phosphatase (ALP)
- Total Bilirubin
- Albumin
- Globulin
- Total Protein
Kidney Function
- Creatinine
- Urea
- Estimated Glomerular Filtration Rate (eGFR)
- Sodium
Pancreatic Markers
- Lipase
- Amylase
Weight Loss Management Advanced
Our most comprehensive weight-loss blood test. 43 biomarkers covering metabolism, thyroid, iron, vitamins, and full blood count for complete clinical...
Lipid Profile
- Total Cholesterol
- Low Density Lipoprotein (LDL) Cholesterol
- High-Density Lipoprotein (HDL) Cholesterol
- HDL Percentage
- Triglycerides
Diabetes & Metabolic Health
- HbA1c (Glycosylated Haemoglobin)
Thyroid Function
- Thyroid Stimulating (TSH)
- Free T4 (Thyroxine)
Liver Function
- Alanine Transaminase (ALT)
- Aspartate Aminotransferase (AST)
- Gamma Glutamyl Transferase (GGT)
- Alkaline Phosphatase (ALP)
- Total Bilirubin
- Albumin
- Globulin
- Total Protein
Kidney Function
- Creatinine
- Urea
- Estimated Glomerular Filtration Rate (eGFR)
- Sodium
Pancreatic Markers
- Lipase
- Amylase
Full Blood Count
- Haemoglobin
- Haematocrit
- Red Cell Count
- Mean Cell Volume (MCV)
- Mean Cell Haemoglobin (MCH)
- Mean Cell Haemoglobin Concentration (MCHC)
- Red Cell Distribution Width (RDW)
- White Cell Count
- Neutrophils
- Lymphocytes
- Monocytes
- Eosinophils
- Basophils
- Platelet Count
- Mean Platelet Volume (MPV)
Iron Status
- Iron
- Total Iron-Binding Capacity (TIBC)
- Unsaturated Iron-Binding Capacity (UIBC)
- Transferrin Saturation
Vitamins
- Vitamin D (25-OH)
- Vitamin B12
Not sure what test you need?
When to Test - A Monitoring Timeline
This is general guidance - your clinician will tailor the exact schedule based on your dose, health history, and how you’re tolerating treatment.
| Stage | When | Recommended Test | Why |
|---|---|---|---|
| Baseline | Before your first injection | Essential £99 | Establishes a health reference point and screens for any issues that would change your treatment plan. |
| Dose escalation | Weeks 4–8 (first dose increase) | Essential £99 | Confirms your liver, kidney and pancreas are tolerating the higher dose. |
| 12-week review | Month 3 of treatment | Advanced £179 | Gives a full picture once you’re settled on a maintenance dose - catches any nutritional deficiencies and confirms progress. |
| Ongoing | Every 3–6 months on maintenance | Essential or + Thyroid | Routine monitoring to keep your treatment safe long-term. |
Not on weight loss medication?
These tests aren’t just for patients on Mounjaro or Wegovy. They’re equally useful if you’re making significant lifestyle changes, starting an intensive fitness programme, or simply want to understand why weight loss has been difficult despite doing “the right things”. A blood test will often reveal things a scale cannot - underactive thyroid, insulin resistance, iron deficiency, or Vitamin D deficiency are all common contributors to stubborn weight and low energy.
How It Works
Quick, private and straightforward. Most appointments take under 15 minutes
Choose your test
Essential, + Thyroid, or Advanced. Unsure which? Our team is happy to advise based on your treatment plan.
Visit the clinic
Your blood sample is taken by our clinical team in Longridge. The appointment takes around 10 minutes.
72-Hour Results
Clear results with a clinician's commentary and next steps.
Review with a clinician
If anything in your results needs explaining or acting on, we’ll book you a follow-up to discuss next steps.
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Why Choose Longridge Health Clinic?
Get professional blood testing with fast results and expert guidance. Our GPhC registered pharmacists ensure you receive the highest standard of care.
Qualified, Registered Clinicians
Every appointment is performed by a fully qualified, professionally registered phlebotomist.
No GP Referral
Book directly and bypass NHS waiting lists entirely.
Doctor's Commentary
Every result interpreted in plain English, with next steps.
Discreet & Confidential
A secure, discreet, judgement free service.
Stop Guessing and Get Answers
Don't wait for symptoms to worsen. Book your appointment today and get answers.
Frequently Asked Questions
- Qualified Pharmacists
- Flexible Appointments
- Top Customer Service
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.
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.
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 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 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.
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 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.
Book Your Blood Test Today
Whether you’re starting Mounjaro, switching to Wegovy, or just want a clearer picture of your health, the right blood test gives you the clarity to move forward safely. Our clinic in Longridge serves patients across Lancashire - Preston, Blackburn, Burnley, and beyond, with transparent pricing and 3-day turnaround.
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