Affiliate disclosure
The Amazon and clinic links on this page are affiliate links. If you click and purchase, I may earn a small commission at no extra cost to you. This never influences my recommendations — everything here is kit I have actually bought.
Medical disclaimer
This page lists equipment, not medication, and documents personal experience rather than medical advice. Consult a healthcare professional before starting any medication.
The essentials
Six items. That's genuinely it. Anything beyond this list is optional, and most of it is unnecessary.
Precision Peptides Reusable Peptide Pen Kit
The single item worth spending money on, and the one I'd tell you not to economise on. A reusable pen takes a 3ml cartridge and lets you dial an exact dose, which matters enormously when you're titrating upward in small steps. The alternative — drawing from a vial with syringes — is cheaper but far easier to get wrong. UK seller, refillable, adjustable dosing.
Roughly £16–32
View on AmazonRuiunchu 3ml pen cartridges — 15 pack
These are what your reconstituted peptide lives in, and what the pen actually loads. Check the cartridge diameter matches your specific pen before ordering — this is the most common and most annoying mistake people make. These are the ones that fit the Precision Peptides pen above.
Roughly £10 for 15
View on AmazonPen needles — 31G, 4mm, 100 pack
4mm is short enough to sit in subcutaneous fat rather than muscle, and 31G is thin enough that you largely don't feel it. A box of 100 lasts around two years at one injection a week. Do not reuse them — they blunt after a single use, and that's when injections start to hurt.
Roughly £10 per 100
View on Amazon1ml dispensing syringes — 31G, 100 pack
Not for injecting — these are for transferring liquid from the reconstituted vial into the pen cartridge. You could manage without them, but the transfer is fiddly and wasteful if you try. A pack of 100 is far more than you'll ever need, which is fine given what they cost.
Roughly £8 per 100
View on AmazonHealand Labs bacteriostatic water — 30ml
Sterile water containing benzyl alcohol, which is what stops bacterial growth once a vial has been opened. This is what you reconstitute freeze-dried powder with. Plain sterile water is not a substitute — it has no preservative, so a reconstituted vial won't keep. Multi-use vial, so one bottle covers several reconstitutions.
Roughly £10
View on AmazonOptiPro pre-injection wipes — 100 pack
70% isopropyl, individually wrapped. Wipe the vial stopper before every draw and the injection site before every jab. They cost almost nothing and they are the main thing standing between you and an infection. Buy a box and stop thinking about it.
Roughly £3–5 per 100
View on AmazonSharpsguard sharps bin — 1 litre
Not optional, and not something to improvise with a drinks bottle. Used needles must go in a proper sharps container. A 1-litre bin lasts most people a year or more, and many local councils and pharmacies will take a full one for disposal — check yours before you need to, not after.
Roughly £4–8
View on AmazonThe complete starter kit checklist
Print it, tick it off, and you're ready.
- Reusable peptide pen (check the cartridge size it takes)
- 3ml cartridges — matching your pen
- Pen needles, 31G 4mm — box of 100
- 1ml dispensing syringes — for vial-to-cartridge transfer
- Bacteriostatic water — not plain sterile water
- Alcohol swabs, 70% isopropyl — box of 100
- Sharps bin — 1 litre
- Digital scale for weigh-ins (you almost certainly own one)
- A note of your council's sharps disposal arrangement
Total for the equipment: roughly £60–80, nearly all of it one-off. Add the peptide itself (~£51 for a kit that lasts months) and you're at roughly £110–130 to start. The consumables — needles, syringes and swabs — work out at pennies per week thereafter.
For context, that entire setup costs less than a single month at a private clinic.
What you don't need
Things I either bought and regretted, or nearly bought and am glad I didn't:
- Insulin syringes for injecting — if you've got a pen, you don't need them too. (Not to be confused with the 1ml dispensing syringes above, which are for transferring liquid into the cartridge, not for injecting.)
- A dedicated peptide fridge — your kitchen fridge is fine. It needs to be 2–8°C, which it already is.
- Reconstitution calculators sold as apps — the maths is one division. Free calculators do it perfectly well.
- Branded "peptide starter bundles" — almost always the same items above at a significant markup.
Licensed UK clinics
If the research peptide route isn't for you — and for a great many people it sensibly isn't — the alternative is a licensed prescription through a UK clinic. You'll pay considerably more, and in exchange you get a regulated supply chain, a prescriber who knows your medical history, and someone to ring when something goes wrong. That is not a small thing.
These clinics prescribe licensed medications such as Mounjaro and Wegovy. None of them prescribe Retatrutide, which is not licensed in the UK.
Numan
UK men's health service offering licensed weight loss prescriptions with ongoing clinical support. Includes an initial consultation and regular check-ins as part of the subscription.
Prescription — from around £100/month
Visit NumanJuniper
UK weight loss programme pairing licensed medication with a structured health coaching plan. Aimed at people who want the behavioural side handled alongside the prescription.
Prescription — from around £100/month
Visit JuniperOne last time
Equipment is the easy part. The compound is not. Sourcing unlicensed peptides from unregulated suppliers carries genuine risks around purity, dosing and contamination, and no amount of good kit changes that. Speak to a qualified healthcare professional before starting anything.