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...
This monitoring panel is designed to assess physiological response and safety 8–12 weeks after starting longevity or peptide protocols. It helps optimise dosing and detect early metabolic or hormonal shifts.
Turnaround time
1 day
Biomarkers count
40
Professional phlebotomist comes to you
+ £{{ home_visit_fee }}
Visit our clinic for your test
{{ clinic_visit_fee > 0 ? '+ £' + clinic_visit_fee : 'Free' }}
Home visits require at least 24 hours notice.
{{ clinic.full_address }}
{{ selectedClinic.full_address }}
Available time slots: {{ timeSlots.length}}
{{ addon.excerpt }}
SelectedA peptide monitoring profile is an advanced blood test designed to track how your body responds to different types of peptide therapies — from recovery and anti-ageing to weight loss GLP-1 protocols.
Whether you're using BPC-157, TB-500, Glow peptides, or metabolic peptides like Retatrutide (Reta) and Tirzepatide, this test gives you real biological feedback on what’s happening internally.
Peptides are not isolated compounds — they influence multiple systems simultaneously:
Without monitoring, you're essentially guessing.
This profile is designed to support users across all major peptide categories, including those in your protocol or clinic offering:
These are some of the most powerful weight loss peptides, directly impacting:
Here’s the reality:
That means:
Without testing, you won’t know which one you're doing.
This profile focuses on systems impacted by ALL peptide types, not just one category.
Essential if you're using Tirzepatide or Retatrutide:
Tracks fat loss efficiency, insulin sensitivity, and metabolic health.
Critical for BPC-157, TB-500, Wolverine:
Shows whether your body is actually healing or still inflamed.
Peptides indirectly impact endocrine function:
All peptides are processed through your system:
Ensures safe usage.
Relevant for NAD+, MOTC, Glow peptides:
Supports optimisation, not just safety.
This is built for people who are:
Fast, efficient, no friction.
Simple steps to get your results
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
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 UsFollow these guidelines for accurate results
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 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.
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.
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.
Discover more options in this category:
This test measures 1,25-dihydroxyvitamin D, the biologically active form of vitamin D. It is used to investigate calcium imbalance, kidney disease and...
This test measures 17-hydroxyprogesterone, a hormone involved in cortisol production. It is used to assess adrenal function and diagnose congenital ad...
The 5-HIAA (5-Hydroxyindoleacetic Acid) blood test measures the amount of 5-HIAA, a breakdown product of serotonin, in the bloodstream. Elevated level...
This test measures 6-thioguanine nucleotide levels to monitor thiopurine medications. It helps optimise treatment effectiveness while reducing toxicit...
This PCR screen detects seven common sexually transmitted infections with high accuracy. It identifies active infections even when symptoms are mild o...