1,25-dihydroxyvitamin D (calcitriol)
This test measures 1,25-dihydroxyvitamin D, the biologically active form of vitamin D. It is used to investigate calcium imbalance, kidney disease and...
Zinc
88.00
This test measures zinc levels in the blood to assess nutritional and immune status. Zinc is essential for skin health, immunity, and hormone balance.
Turnaround time
1-2 days
Biomarkers count
1
Same-Day Appointments
UKAS Accredited Labs
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Under 18? Patients under 18 can only be seen at GB Medlabs and Clinilabs, Monday to Friday only.
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Details about Zinc
What is a Zinc test?
A zinc test measures the level of zinc in your blood, an essential trace mineral involved in immune defence, wound healing, hormone regulation, and skin integrity. Zinc is required for hundreds of enzyme reactions and plays a key role in growth, fertility, and cellular repair.
Zinc deficiency is more common than many people realise and often goes undetected without testing, especially in people with poor diet, digestive issues, or high stress levels.
Why do I need a Zinc test?
Low zinc levels can affect immunity, hair and skin health, fertility, and recovery from illness. Many symptoms are subtle and mistaken for other conditions.
Reasons for testing include:
• Frequent infections
• Hair thinning or hair loss
• Slow wound healing
• Acne or skin issues
• Poor appetite or taste changes
• Digestive problems
• Fertility concerns
• Low testosterone symptoms
• Chronic stress
• Restricted or vegetarian diets
Benefits of the test
1. Assesses immune system support
2. Evaluates skin and hair health
3. Supports fertility and hormone balance
4. Detects hidden nutritional deficiency
5. Useful for vegetarians and restricted diets
6. Helps explain poor wound healing
7. Supports recovery after illness
8. Guides targeted supplementation
Expanded benefit explanation
Zinc is involved in immunity, hormone production, and tissue repair. Identifying deficiency allows precise supplementation and improved overall health.
Step-by-step — How testing works
We offer two UK-wide testing options:
Clinic testing
• Choose nearest UK clinic
• Blood sample collected
• Laboratory analysis performed
• Results securely returned
Home visit (+£60)
• Phlebotomist visits you
• Blood sample collected safely
• Sample sent to lab
• Results delivered confidentially
Your results explained
Low levels
Typical UK reference range: 10–18 µmol/L
Low zinc may explain poor immunity, hair loss, skin problems, and fatigue.
Normal levels
Zinc levels within range indicate adequate nutritional status.
High levels
High zinc is uncommon but may occur with excessive supplementation and can interfere with copper balance.
How It Works
Simple steps to get your results
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Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
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Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
3
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.
Frequently Asked Questions
Yes, zinc plays a key role in hair growth.
Yes, it is essential for immune cell function.
Avoid supplements for 24 hours before testing.
Fasting is not usually required.
Yes, it influences testosterone and reproductive health.
Yes, chronic stress can deplete zinc.
Yes, especially with poor diet or digestive issues.
Yes, plant-based diets may reduce absorption.
If low, repeat after supplementation.
Yes, excess zinc can disrupt mineral balance.
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