Peptides are short chains of amino acids that act as biological messengers within the body. They occur naturally — insulin and GLP-1 are peptides — and scientific research is exploring how synthetic versions may interact with cellular repair pathways, hormone regulation, tissue regeneration, inflammatory signaling, and metabolic function. At The Catalyst Clinic, all discussions take place within a private medical consultation with a qualified clinician.

Is peptide therapy legal in the UK?

Yes. Peptide compounds are not licensed medicines under the Human Medicines Regulations 2012, which means GMC-registered physicians can legally discuss and advise on them within a regulated private medical consultation. The Catalyst Clinic operates in full compliance with MHRA, ASA, and CQC guidance.

What is the safest peptide clinic in London?

Safety in peptide therapy is determined by the clinical process surrounding it, not the compound alone. The safest peptide clinic is one supervised by a GMC-registered physician, based on comprehensive pre-consultation bloodwork, using pharmaceutical-grade compounds from GMP-certified, EMA-regulated pharmacies, with ongoing monitoring throughout. At The Catalyst Clinic, mandatory bloodwork, pharmacy-grade compounds, and monthly clinical reviews are non-negotiable standards applied to every patient.

What is the difference between peptide therapy and HGH?

HGH is a direct hormone replacement that introduces synthetic hormone into the body, bypassing the pituitary and suppressing natural GH production over time. Peptide secretagogues such as CJC-1295 and Ipamorelin signal the pituitary gland to produce its own growth hormone naturally, preserving the body's regulatory feedback mechanisms. The Catalyst Clinic does not offer HGH — only peptide-based approaches that work with your biology.

How much does peptide therapy cost in London?

At The Catalyst Clinic, programs start from £600 per month, which includes mandatory pre-consultation bloodwork, a personally designed protocol by Dr. Ethan Hausman-Marquis, pharmaceutical-grade compounds from GMP-certified pharmacies, and ongoing monthly reviews. An initial consultation fee applies from £150.

How is The Catalyst Clinic different from other peptide clinics in London?

The Catalyst Clinic is the only clinic in London where every program is designed and overseen by a physician with a PhD in Cell and Genomic Biology (Karolinska Institute) and nearly 20 years of peptide-specific research experience. Mandatory diagnostics before any consultation and pharmaceutical-grade compounds from GMP-certified, EMA-regulated pharmacies are non-negotiable standards at The Catalyst Clinic.

Are the peptides at The Catalyst Clinic pharmaceutical grade?

Yes. Every compound discussed within a Catalyst Clinic program is sourced exclusively from GMP-certified, EMA-regulated, and FDA-registered compounding pharmacies. Each compound is accompanied by a certificate of analysis confirming identity, purity, and potency. The Catalyst Clinic does not source from unregulated vendors or grey-market suppliers.

Is bloodwork required before a peptide consultation?

Yes — mandatory. Bloodwork establishes your baseline hormone levels, inflammatory markers, metabolic function, and organ health. Without this data it is not possible to design a safe, clinically appropriate program. This standard applies to every patient at The Catalyst Clinic regardless of age, health history, or stated goals.

Can I access The Catalyst Clinic remotely?

Yes. The Catalyst Clinic offers remote consultations for patients across the UK, Europe, the UAE, Australia, Canada, and the United States. The clinical standard — mandatory diagnostics and ongoing monitoring — remains identical for all patients regardless of location.

Does The Catalyst Clinic serve patients in Europe?

Yes. The Catalyst Clinic operates clinics in London (96 Kensington High Street) and Zürich (Bahnhofstrasse 10), and offers remote consultations for patients across the UK, Europe, UAE, Australia, Canada, and the United States. All programs follow the same mandatory diagnostics and clinical oversight standards regardless of location.

Peptide Science Podcast & Blog | The Catalyst Clinic London

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

Clinical panels across every major system

2–3

Working days for laboratory results

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.

Book the 360° Assessment Compare with the standard panel Pricing confirmed at consultation

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.

Panel Index

What's Included

All twenty-five panels in the 360° Assessment. Tap any panel for a one-line note on what it covers.

Lipids, blood pressure markers and cardiovascular risk indicators.

Blood glucose, HbA1c and insulin markers linked to metabolic health.

Combined markers for insulin resistance, central weight gain and related risk.

Red cells, white cells and platelets — the foundation of a blood workup.

Ferritin and related markers for iron deficiency or overload.

Testosterone and related hormones relevant to male health.

Oestrogen, progesterone and related hormones across the cycle.

TSH and thyroid hormones governing metabolism and energy.

Cortisol and pituitary hormones that regulate the body's hormone axis.

Biomarkers associated with chronic physiological stress load.

Liver enzymes and function markers.

Creatinine and filtration markers of kidney function.

Markers of pancreatic enzyme function.

A urine sample screen for kidney and urinary tract indicators.

Calcium, vitamin D and markers of bone turnover.

General markers of inflammation and active infection.

Antibody markers associated with autoimmune activity.

IgE and related markers for common allergic sensitivities.

Markers related to digestion and nutrient absorption.

An at-home stool test screening for bowel-related indicators.

Key vitamins and minerals, including B12, folate and zinc.

Markers of muscle breakdown and joint inflammation.

PSA, an indicator reviewed alongside your wider risk profile.

Indicator markers reviewed in context, never read in isolation.

Blood pressure, weight and other measurements taken at your visit.

From time to time there may be temporary changes to the panel menu. If you are booking for a specific marker, contact us in advance of your appointment to confirm availability.

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 200+ 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.

About the 360° Assessment The 360° Advanced Health Intelligence Assessment is a private health assessment, not a screening programme and not a diagnostic test. A result inside the reference range does not exclude disease, and a result outside it does not confirm one. Markers such as PSA and tumour markers are indicators only; where a finding warrants further investigation, Dr. Ethan will refer you to your GP or to an appropriate specialist. Analysis is performed by an accredited third-party laboratory partner; details of the laboratory and of how your sample and data are handled are provided in your patient information pack before you consent to testing. This assessment does not replace NHS screening programmes you are eligible for, including cervical, breast and bowel screening.

The Catalyst Clinic 360°Advanced Health Intelligence Assessment

What the 360°Assesses

What's Included

What the 360°Adds

How to Prepare

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