VETUD / Formats
The dual-chamber pen, explained
Every VETUD peptide comes as a dual-chamber vial, a vial or a pen kit box with the reusable pen. Here's how the pen works, what each one includes, and how to choose.
How it's built
- Cartridge holder
- The clear sleeve at the top of the pen. The cartridge sits inside it, so you can see both chambers.
- Peptide chamber
- The front chamber holds the lyophilized (freeze-dried) peptide as a dry powder, which keeps it stable.
- BAC-water chamber
- The rear chamber holds bacteriostatic water. A rubber stopper keeps it apart from the powder until the cartridge is used.
- Pen body
- The reusable metal body below the holder. It comes in the pen kit box, with 12 disposable needles and an instruction booklet.
Reusable
One pen body, many cartridges
The VETUD dual-chamber pen is reusable. It comes in the pen kit box; keep the pen body and replace the cartridge with a new dual-chamber vial when it's empty.
A pen body that stays
The metal body is made to last. The drive, the rear dial and the indicator window stay with the pen; only the cartridge inside is changed.
Transparent, graduated holder
The clear holder supports the cartridge and connects it to the pen body. Its printed scale leaves both chambers visible, so you can see the powder, the liquid and how much is left.
Two chambers in each cartridge
The freeze-dried peptide sits in the front chamber and the diluent (bacteriostatic water) in the rear chamber, kept apart by a rubber stopper. They don't touch until the cartridge is used.
Mixed inside the cartridge
When the cartridge is used, the moving stopper reaches a small bypass channel in the glass. The liquid flows around it into the front chamber and the powder dissolves there, so there's no separate mixing vial.
Replace the cartridge when it's empty
Take out the empty cartridge and fit a new dual-chamber vial, sold on its own. Nothing else changes.
Why reusable
You buy the pen once, in the pen kit box. After that, refills cost less than a new kit, and there's less to throw away.
Dual-chamber vial, vial or pen kit box: which to choose
Same peptide, same amounts. New to the pen? Start with the pen kit box: the reusable pen, a dual-chamber vial, needles and a booklet. Already have the pen? Order dual-chamber vials to refill it. Choose the vial if you already have bacteriostatic water and your own supplies; it's the lowest price.
| Pen kit box | Dual-chamber vial | Vial | |
|---|---|---|---|
| What you get | The reusable pen, 1 dual-chamber vial, 12 needles and a booklet, in the VETUD box | 1 dual-chamber vial (cartridge), to refill the reusable pen | 1 sealed vial of freeze-dried powder |
| BAC water | Included, in the cartridge | Included, in the cartridge | Sold separately |
| Price | Highest | Mid-price | Lowest |
Questions
With a dual-chamber vial or the pen kit box, yes: it's already in the cartridge's second chamber. With a vial, no: add bacteriostatic water (10 ml or 30 ml) and U-100 syringes from the product page.
The amount of peptide is the same. The pen kit box has the reusable pen with one dual-chamber vial, 12 disposable needles and an instruction booklet, in the VETUD box. A dual-chamber vial is the two-chamber cartridge on its own, to refill the pen. A vial is the freeze-dried powder on its own, at the lowest price.
Yes. Buy the pen kit box once, keep the pen body, and replace the cartridge with a new dual-chamber vial when it's empty.
Every peptide. Each product page lets you choose a dual-chamber vial, a vial or the pen kit box, and shows the price of each amount. Selank and Semax come as a nasal spray in place of the pen kit box. Bacteriostatic water comes as a cartridge or a vial.
No. Like everything we sell, the pen and the vial are supplied for laboratory research use only, not for human or veterinary use. This page describes the packaging; it isn't a guide to using it.