Diagnostics First · London · Kensington
Blood
Diagnostics
London
At The Catalyst Clinic, comprehensive bloodwork is not optional — it is the foundation of every programme. Without your data, no protocol is discussed. Bloodwork establishes your baseline, uncovers hidden imbalances, and ensures every clinical decision is safe, appropriate, and traceable to your biology.
Why Diagnostics Matter
100%
of patients require bloodwork before any protocol
60+
biomarkers assessed per panel
4–5
months between repeat diagnostics
0
protocols designed without data
Every result is reviewed personally by Dr. Ethan Hausman-Marquis — not delegated. Not algorithmic. Personal.
The Foundation
Why Bloodwork is Non-Negotiable
Most clinics skip diagnostics. We consider this the single greatest clinical risk in peptide advisory medicine. Your bloodwork is not a box-ticking exercise — it is the entire basis on which a safe, appropriate, and effective programme can be designed.
Reason 01
Establishes Your Baseline
Before any programme can be designed, Dr. Ethan needs to know exactly where your biology is starting from. Hormone levels, inflammatory markers, organ function, metabolic health — all established before anything else is discussed.
- Hormone profile baseline
- Inflammatory marker baseline
- Metabolic function baseline
- Organ health confirmation
Reason 02
Uncovers Hidden Imbalances
Many patients present with imbalances they are completely unaware of — subclinical thyroid dysfunction, testosterone deficiency, elevated inflammatory markers, insulin resistance. These must be identified before any protocol is designed.
- Subclinical thyroid dysfunction
- Hormonal deficiencies
- Inflammatory burden
- Metabolic imbalances
Reason 03
Ensures Clinical Safety
Certain compounds are contraindicated in specific clinical contexts. Without bloodwork, contraindications cannot be screened for. This is not optional — it is the most fundamental patient safety requirement in this field.
- Contraindication screening
- Drug interaction assessment
- Organ function verification
- Cancer marker screening where relevant
Reason 04
Guides Compound Selection
Your diagnostic results determine which compounds are relevant to your profile, which are unnecessary, and which should be avoided entirely. No two protocols are identical because no two patients have identical bloodwork.
- Data-driven compound matching
- Eliminates unnecessary compounds
- Identifies highest-priority areas
- Prevents protocol waste
Reason 05
Enables Progress Tracking
Without a baseline, progress cannot be measured. Repeat bloodwork every four to five months allows Dr. Ethan to assess what is changing, what is improving, and what adjustments need to be made — all based on data, not guesswork.
- Objective progress measurement
- Protocol refinement based on data
- Long-term health trend tracking
- Documented clinical history
Reason 06
Maintains Clinical Appropriateness
Biology changes. A protocol that is appropriate today may not be appropriate in six months. Regular diagnostics ensure that clinical oversight is ongoing — not just a one-time assessment at the start of a programme.
- Ongoing clinical appropriateness
- Adaptation to biological changes
- Prevents protocol staleness
- Continuous physician oversight
The Panels
What We Test
Our standard diagnostic panel is selected by Dr. Ethan based on nearly 20 years of specialist experience in peptide science and regenerative physiology. Every marker included has a specific clinical rationale. Patients who want wider coverage can upgrade to the 360° Advanced Health Intelligence Assessment, detailed below.
Core Panel
Complete Blood Count & Metabolic
- Full Blood Count (FBC) — red cells, white cells, platelets, haemoglobin
- Comprehensive Metabolic Panel — kidney function, liver enzymes, electrolytes
- HbA1c — long-term blood glucose regulation
- Fasting glucose and insulin — metabolic health
- Lipid panel — total cholesterol, LDL, HDL, triglycerides
- eGFR — kidney filtration rate
- ALT, AST, GGT — liver function markers
Hormonal Panel
Endocrine & Reproductive Hormones
- Total and free testosterone
- Oestradiol (E2)
- Progesterone
- SHBG — sex hormone binding globulin
- LH and FSH — pituitary gonadotrophins
- Prolactin
Growth Hormone Axis
GH & IGF-1 Markers
- IGF-1 (Insulin-like Growth Factor 1) — GH axis proxy
- IGFBP-3 — IGF binding protein
- Growth hormone (fasting) where indicated
- Cortisol — HPA axis assessment
- ACTH — adrenocorticotropic hormone
Thyroid Panel
Full Thyroid Function
- TSH — thyroid stimulating hormone
- Free T3 (FT3) — active thyroid hormone
- Free T4 (FT4) — thyroid prohormone
- Reverse T3 (rT3) where indicated
- Anti-TPO antibodies — autoimmune thyroid screening
- Anti-thyroglobulin antibodies
Inflammatory Markers
Systemic Inflammation Assessment
- High-sensitivity CRP (hsCRP)
- ESR — erythrocyte sedimentation rate
- Homocysteine
- Fibrinogen where indicated
- IL-6 (Interleukin-6) where indicated
- Ferritin — iron stores and inflammation marker
Additional Markers
Longevity & Nutritional Panel
- Vitamin D (25-OH) — immune and hormonal function
- Vitamin B12 and folate
- Iron studies — serum iron, transferrin, saturation
- Zinc and magnesium
- PSA (males over 40) — prostate health
- Tumour markers where clinically indicated
Flagship Diagnostic
The Catalyst Clinic 360°Advanced Health Intelligence Assessment
Twenty-five clinical panels · One blood draw · One physician
The 360° Assessment is the most complete diagnostic workup available at The Catalyst Clinic. Where our standard panel establishes the biomarkers directly relevant to a peptide advisory programme, the 360° looks across the whole system — cardiometabolic, endocrine, hepatic, renal, haematological, immune, digestive and nutritional — in a single fasted draw.
It is designed for patients who want their programme built on the widest possible evidence base, and for those who want a full picture of their health independent of any protocol. Every result is interpreted by Dr. Ethan Hausman-Marquis against your history, your goals and your previous panels.
200+
Individual data points per assessment
25
Clinical panels across every major system
2–3
Working days for laboratory results
1
Physician reading every result — Dr. Ethan
Results are returned as a single structured report and reviewed with you in consultation. No protocol is discussed before that review has taken place.
Coverage
What the 360°Assesses
Twenty-five panels, grouped by physiological system. Markers within each panel are selected for clinical relevance, not volume — every result on the report is one Dr. Ethan will use.
Cardiometabolic
- Heart health
- Diabetes health
- Metabolic syndrome
- Full blood count
- Iron status
Endocrine
- Male hormone profile
- Female hormone profile
- Thyroid health
- Pituitary & adrenal
- Stress markers
Organ Function
- Liver health
- Kidney health
- Pancreatic health
- Urinalysis
- Bone health
Immune & Inflammatory
- Infection & inflammation
- Autoimmune markers
- Allergy evaluation
Digestive
- Digestive health
- Bowel health
Nutrition & Screening
- Nutritional health
- Muscle & joint health
- Prostate health
- Tumour markers
- Personal health measurements
Panel composition may vary where a marker is temporarily unavailable or where a marker is not clinically appropriate for you. Dr. Ethan will confirm the exact composition of your assessment before your draw.
Standard Panel vs 360°
What the 360°Adds
Our standard panel is sufficient to design and monitor a peptide advisory programme safely. The 360° is for patients who want the wider context around it.
Breadth
The standard panel assesses 60+ biomarkers chosen for their relevance to peptide science and endocrine function. The 360° extends that to 200+ data points, adding coverage of digestive, immune, allergy, bone and urinary systems that a targeted panel does not reach.
Systems, not silos
Fatigue can originate in the thyroid, the adrenals, iron handling, inflammation, or absorption. Testing one system at a time answers one question at a time. Assessing all of them from a single draw lets Dr. Ethan compare them against each other rather than in isolation.
Comparable over time
Because the same panels are run each time, repeat assessments are directly comparable. Your report is read against your own previous results, not only against population reference ranges — which is where a change that stays inside "normal" still becomes visible.
The same interpretation
Breadth without interpretation produces anxiety, not insight. Every marker on the 360° is read by Dr. Ethan personally and discussed with you in context. Nothing is auto-flagged, auto-scored, or handed to a nurse or an algorithm to summarise.
Before Your Draw
How to Prepare
Preparation materially affects the accuracy of several panels. Please read these before your appointment — if you are unable to follow any of them, tell us rather than rescheduling silently, as some can be accounted for at interpretation.
Fast for 8 hours
Water only. Eating beforehand affects lipids, glucose, insulin, iron status and testosterone. Do not fast longer than 12 hours — extended fasting distorts results and increases the risk of feeling unwell during the draw.
Drink water
Arrive well hydrated. Dehydration concentrates the sample, makes venous access harder, and is one of the commonest reasons a draw has to be repeated.
Pause biotin
Biotin (vitamin B7) is present in most multivitamins and hair and nail supplements, and interferes with several immunoassays including thyroid and hormone markers. Stop 48 hours before testing — unless it was prescribed, in which case speak to your prescriber first.
Pause other supplements
Stop non-prescribed supplements 48 hours beforehand so that what we measure reflects your baseline rather than this morning's dose. Continue all prescribed medication unless Dr. Ethan has told you otherwise.
No strenuous exercise
Avoid hard training for 48 hours. Intense exercise raises creatine kinase, inflammatory markers and liver enzymes, and can make a healthy result look abnormal. Do not smoke for at least 30 minutes before the appointment.
Timing for cycling patients
If you menstruate and your hormone results matter to your programme, we usually draw on day two to five of your cycle — day three is ideal. Tell us your cycle when booking and we will schedule around it.
The Difference
Most Clinics Don't Do This
The majority of peptide clinics in London do not require comprehensive pre-consultation bloodwork. At The Catalyst Clinic, it is non-negotiable for every patient, every time.
01
Not Optional
Bloodwork is a mandatory prerequisite — not an add-on. No patient proceeds to a protocol discussion without complete diagnostics reviewed by Dr. Ethan.
02
Personally Reviewed
Every result is reviewed by Dr. Ethan. Not a nurse, not an algorithm. The physician who designed your programme.
03
Repeated Regularly
Diagnostics are not a one-time event. Bloodwork is repeated every four to five months throughout your programme to ensure continued clinical appropriateness.
04
Fully Documented
Every result, every decision, every protocol adjustment is documented and traceable. You always know what is in your programme and why it is there.
05
Globally Available
Remote patients can access diagnostics through local phlebotomy services. The clinical standard remains identical regardless of your location — UK, Europe, UAE, USA, or Australia.
06
PhD-Level Interpretation
Reading bloodwork is a skill. Interpreting it in the context of peptide science requires nearly 20 years of specialist research experience. That is what every patient at The Catalyst Clinic receives.
The Clinical Standard
Data Before Everything.
The Catalyst Clinic operates within a fully regulated private medical framework. All clinical programmes are physician-led, diagnostics-based, and subject to ongoing medical oversight by a GMC-registered physician.
The physician reviewing your bloodwork holds a PhD in Cell and Genomic Biology and has published two works in peptide science. That is the depth of interpretation behind every result we return to you.
If a clinic does not require bloodwork before offering a peptide programme — that is the most important question to ask them. It is also the most important reason to choose us.
"Without your data, I cannot design a safe programme. Bloodwork is not a formality — it is the entire clinical foundation. Every compound I discuss is selected because your results indicate it is relevant to your specific biology."
Dr. Ethan Hausman-Marquis
- PhD, Cell & Genomic Biology — Karolinska Institute, Stockholm
- US & European Board-Certified, Regenerative Medicine
- Member, American Academy of Anti-Aging Medicine (A4M)
- Author — Peptide-Based Cancer Therapies
- Author — Exploring the World of Peptides
- Podcast Host — The Science of Age-less Living
- Nearly 20 years specialist bench top peptide research experience
Common Questions
Frequently Asked
Begin Your Programme
Every programme
begins with
your data.
Book a discovery consultation and begin with a comprehensive diagnostic panel — or with the 360° Advanced Health Intelligence Assessment — personally reviewed by Dr. Ethan Hausman-Marquis before any protocol is discussed.
Every Programme Includes
- Mandatory pre-consultation bloodwork
- 60+ biomarkers assessed as standard
- Optional 360° Assessment — 200+ data points
- Personal review by Dr. Ethan
- Full hormonal, metabolic & inflammatory panel
- Repeat diagnostics every 4-5 months
- Full clinical documentation
- Ongoing physician oversight
96 Kensington High Street, London W8 4SG
Remote consultations available worldwide
The Catalyst Clinic provides medical advisory consultations only. Diagnostic testing is conducted to inform clinical discussions and does not constitute a formal diagnosis. Samples are analysed by an accredited third-party laboratory partner and results are reviewed by a GMC-registered physician within a regulated private medical framework. Health assessments offered by the clinic, including the 360° Advanced Health Intelligence Assessment, are not screening programmes and do not replace NHS screening you are eligible for. Nothing on this page constitutes medical advice or a treatment recommendation. For our full regulatory and compliance statement visit thecatalystclinic.com/compliance-uk.