Official stockist · AERVYN pens · 24 in the range
The pen.
The paperwork.
The right one.
24 pre-filled 3 mL dose-dial pens, priced in sterling from the manufacturer's list, each lot tested by an independent laboratory with the certificate published against the lot number. The 7-minute Peptide Checkup matches you to one of them — or tells you not to buy.
02 — The range · 8 of 24
One format. 24 pens. No vials, no kits, no reconstitution.
Pre-filled 3 mL dose-dial pens across 7 categories, photographed as they ship where photography exists. 20 are single compounds and 4 — Wolverine, Klow, Glow and CagriSema — are blends; each carries a lot number and a published certificate of analysis. The featured and bestselling pens are below. Which one — if any — is the Checkup’s job, not the strip’s.
View all 24- Tesamorelin20 mg / 3 mL£255Details
- NAD+500 mg / 3 mL£285Details
- Wolverine40 mg / 3 mL£235Details
- Illustration — photo to followBPC-15710 mg / 3 mL£170Details
- Illustration — photo to followSemaglutide10 mg / 3 mL£265Details
- MOTS-C60 mg / 3 mL£255Details
- GHK-Cu100 mg / 3 mL£215Details
- Klow80 mg / 3 mL£340Details
03 — Start from the problem · 8 problems
Say what’s wrong. The Checkup says which pen — or none.
Each cell names the pen the Checkup usually lands on for that problem, quoting the catalogue’s own description of who the pen is for. It is a starting point, not a verdict: the assessment checks your history and medicines first and can end at no pen at all. Where the compound is an authorised medicine elsewhere, the pen is a research product, not that medicine.
All entry points- 01Body compositionBelly fat that won’t move“Belly fat that does not move with diet and training”Usually lands onTesamorelin— if your answers allow it
- 02WeightWeight that won’t shift“Significant weight to lose”Usually lands onTirzepatide— if your answers allow it
- 03WellbeingTired all the time“Feeling tired all the time despite sleeping”Usually lands onNAD+— if your answers allow it
- 04InjuryA tendon that won’t settle“A tendon, ligament or joint injury that will not settle”Usually lands onWolverine— if your answers allow it
- 05SkinSkin firmness and texture“Skin ageing, firmness and texture”Usually lands onGHK-Cu— if your answers allow it
- 06Sexual healthLibido that’s dropped“Libido or arousal that has dropped off”Usually lands onPT-141— if your answers allow it
- 07MuscleSlow recovery“Slow recovery between sessions or after illness”Usually lands onNAD+— if your answers allow it
- 08LongevityHealthy ageing“Metabolic health and healthy ageing”Usually lands onMOTS-C— if your answers allow it
04 — How the Checkup works
Answer. Check. Land on a pen.
The Peptide Checkup is the front door to the store. It exists to say which pen fits and, just as often, that none of them does.
Full walkthrough- 01Goal & history≈7 min10 short sections: your goal, the specific problem behind it, medical history in categories, medicines by class, and a safety screen. No account, no essays.
- 02Rules, then a matchDeterministicA fixed set of rules — no language model — checks your answers against 32 compound records and 5 jurisdictions. Then the matcher scores the 24 pens on goal, focus, evidence, experience and the safety verdict. Same answers, same pen.
- 03Your penOr noneYou land on the pen’s page with why it fits, the evidence grade for your goal, what to review, and the option to add it to your cart. Two alternatives are listed. Anything ruled out is named, with the answer that ruled it out.
05 — What’s in every box
Pre-filled. Dose-dial. Refrigerated. Numbered.
Every pen in the range is the same object: 3 mL of solution in a multi-dose pen with a numbered dial window. No powder, no diluent, no drawing up. The rows below are read from the catalogue record for the pen shown.
Sold for research use only. Not a medicine and not authorised for human consumption. Purchasers must be 18+ and confirm intended use at checkout.
06 — What we test
Every lot. Three tests. One certificate.
Testing is done by an independent laboratory, not by us. The four blends — Wolverine, Klow, Glow and CagriSema — are tested per component, with the split stated on the certificate. The certificate is published as issued against the lot number printed on the carton.
Look up a lot numberPurity · HPLC
≥ 99%
High-performance liquid chromatography. The percentage of the main peak is the purity figure on the certificate; the release threshold is 99% — per component for blends.
Identity · LC-MS
Confirmed
Liquid chromatography–mass spectrometry. The measured mass is compared with the expected mass of each compound in the pen. A lot that does not match is not listed.
Endotoxin · LAL
EU/mg
Limulus amebocyte lysate assay for bacterial endotoxin, reported per lot in endotoxin units per milligram of the solution in the pen.
07 — Evidence, honestly · 21 compounds
Where the range sits on the ladder.
Liraglutide, Semaglutide, Tesamorelin and Tirzepatide are the only 4 of 21 compounds in the range graded Strong. Everything else sits at Moderate or below — most of it topical cosmetic, animal or early human data — and the pen page says so in the same type size. Every grade is read from the compound record, and the record is linked from every pen page.
Compound directory- StrongMultiple large randomised controlled trials or regulatory approval for this use.LiraglutideSemaglutide· 2 pensTesamorelinTirzepatide
- ModerateAt least one well-conducted randomised trial or consistent controlled human studies.CagrilintideGonadorelinPT-141 (bremelanotide)RetatrutideThymosin alpha-1
- LimitedSmall or short human studies, mixed results, or evidence mainly for a related use.GHK-Cu· 3 pensNAD+Sermorelin
- PreliminaryEarly-phase human data or case series; findings need replication.CJC-1295IpamorelinLL-37
- InsufficientNo reliable human evidence for this use — animal or laboratory data only.BPC-157· 4 pensEpitalonFOXO4-DRIKPV· 2 pensMOTS-cTB-500· 4 pens
Peptide Checkup
Find your pen in 7 minutes.
Not medical advice · Research-use labelling applies · 18+ only · It can say no