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...
Tired All the Time
173.00
This panel investigates the most common medical causes of ongoing fatigue. It assesses thyroid function, iron status, vitamins, metabolism, and inflammation.
Turnaround time
2-3 days
Biomarkers count
46
Same-Day Appointments
UKAS Accredited Labs
Book your test
Under 18? Patients under 18 can only be seen at GB Medlabs and Clinilabs, Monday to Friday only.
1
Email
2
Service
3
Details
4
Confirm
{{ emailError }}
Choose Service Type
Home visit
Professional phlebotomist comes to you
+ £{{ home_visit_fee }}
In clinic
Visit our clinic for your test
{{ clinic_visit_fee > 0 ? '+ £' + clinic_visit_fee : 'Free' }}
Home Visit Details
{{ homeAddressError }}
Home visits require at least 24 hours notice.
{{ homeTimeError }}
Choose Clinic Option
Select a clinic:
{{ clinic.name }}
{{ clinic.full_address }}
{{ selectedClinic.name }}
{{ selectedClinic.full_address }}
Select a date
{{ timeSlotAlert }}
Select an hour
Available time slots: {{ timeSlots.length}}
{{ slot.preview }}
{{ selectedTime.preview }}
Loading add-ons...
{{ addOnError }}
No recommended add-ons available.
×
{{ addon.name }}
£{{ addon.price }}
{{ addon.excerpt }}
Selected
Selected ({{ selectedAddOns.length }})
£{{ addOnsTotal }}
- {{ sa.name }} £{{ sa.price }}
Included in total above.
Details about Tired All the Time
What is the Tired All The Time test?
The Tired All The Time panel is designed to identify hidden medical reasons for persistent fatigue. Tiredness is often linked to thyroid imbalance, iron deficiency, vitamin deficiencies, metabolic issues, or low-grade inflammation.
This profile includes:
• Full Blood Count (FBC)
• Kidney health (creatinine, eGFR, electrolytes, Cystatin C, magnesium)
• Iron studies (ferritin, iron, TIBC, transferrin, saturation)
• Diabetes markers (glucose, HbA1c, insulin, C-peptide)
• Nutritional markers (B12, folate, vitamin D, calcium, albumin)
• Thyroid panel with antibodies (TSH, Free T3, Free T4, Anti-TPO, Anti-Tg)
• Inflammation marker (CRP)
This combination targets the most frequent biological causes of low energy.
Why do I need this test?
Fatigue is one of the most common symptoms seen in clinical practice, yet the cause is often overlooked without proper testing.
Reasons for testing include:
• Constant tiredness despite sleep
• Brain fog and poor concentration
• Hair thinning or hair loss
• Weight gain or difficulty losing weight
• Low mood or motivation
• Cold intolerance
• Dizziness or weakness
• Pale skin
• Frequent illness
• Poor recovery after illness
This test helps pinpoint whether fatigue is hormonal, nutritional, metabolic, inflammatory, or kidney-related.
Benefits of the test
1. Identifies iron deficiency and anemia
2. Detects thyroid imbalance and autoimmune thyroid disease
3. Assesses vitamin B12, folate, and vitamin D levels
4. Evaluates blood sugar and insulin resistance
5. Detects low-grade inflammation
6. Checks kidney-related fatigue causes
7. Evaluates mineral balance and magnesium
8. Provides targeted insight into fatigue causes
Expanded benefit explanation
Fatigue rarely has a single cause. This panel evaluates multiple systems together to uncover the root contributors rather than treating symptoms blindly.
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
Low iron, B12, folate, vitamin D, or thyroid hormones commonly explain fatigue.
Normal levels
Fatigue may have non-blood related causes requiring further assessment.
High levels
Raised CRP, glucose, insulin, or abnormal thyroid antibodies may indicate inflammation, insulin resistance, or autoimmune thyroid disease.
How It Works
Simple steps to get your results
1
Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
2
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, thyroid imbalance is a very common cause of fatigue.
Low iron reduces oxygen delivery to tissues.
Yes, especially B12, folate, and vitamin D.
Insulin resistance can cause energy crashes.
Yes, through CRP.
Yes, impaired filtration can affect energy levels.
Yes, for accurate glucose and insulin results.
Yes, through Anti-TPO and Anti-Tg antibodies.
If fatigue persists, repeat testing may be advised.
Yes, it is designed specifically for that purpose.
Similar Products in Blood Testing
Discover more options in this category:
17-Hydroxyprogesterone
This test measures 17-hydroxyprogesterone, a hormone involved in cortisol production. It is used to assess adrenal function and diagnose congenital ad...
5 HIAA
The 5-HIAA (5-Hydroxyindoleacetic Acid) blood test measures the amount of 5-HIAA, a breakdown product of serotonin, in the bloodstream. Elevated level...
6-Thioguanine Nucleotides
This test measures 6-thioguanine nucleotide levels to monitor thiopurine medications. It helps optimise treatment effectiveness while reducing toxicit...
7 Sexually Transmitted Infections by PCR
This PCR screen detects seven common sexually transmitted infections with high accuracy. It identifies active infections even when symptoms are mild o...