Stop measuring by syringe. Start dispensing by click.
The Ares Precision Pen is a reusable dial-a-dose dispensing device built around a sealed 3 mL cartridge. Order it prefilled with the compound you research, or refill it with cartridges — every injectable compound in the catalog is available in pen format.
- Reusable pen $79.99 · Starter kit $109.99 · Cartridges from $24.99
- Prefilled pens and cartridge refills across the full catalog
- Free handling guide + 20% off your first pen order
For research and laboratory use only. Not for human or veterinary use.
How researchers start
Buy the reusable Ares Precision Pen on its own, or the starter kit with needles, prep pads and a hard cold-chain case included.
Every injectable compound in the catalog can be supplied as a prefilled pen or a cartridge refill, at any listed vial size. GLP-3RT is the most requested fill.
After the first pen, you only reorder cartridges. The device stays; the cost per fill drops.
A threaded push rod advances a fixed increment per click — repeatable mechanical measurement instead of eyeballing a syringe barrel.
Each cartridge traces back to a batch certificate of analysis with its lot number.
Glass cartridge, rubber plunger and septum, single-use screw-on 32G needles.
Pen fills are assembled in the lab per order; hardware ships from stock.
The Peptide Pen Handling & Storage Guide
Six pages covering pen anatomy, cold-chain storage, cartridge changeover, needle hygiene and how to choose between a prefilled pen, a cartridge refill and a lyophilized vial. Written for laboratory workflows — no dosing guidance, no human-use instructions.
- Pen anatomy
- Cold-chain handling
- Cartridge changeover
- Needle hygiene
Includes code PENFIRST20 · No spam · Unsubscribe anytime · Research use only
Questions before you order
What is a peptide pen?
A peptide pen is a dial-a-dose dispensing device. A sealed 3 mL glass cartridge of reconstituted material sits inside the barrel; turning a click-indexed wheel advances a threaded push rod by a fixed increment, and a single-use screw-on needle dispenses the measured volume. It replaces the vial-and-syringe workflow with a repeatable mechanical measurement.
What is the difference between a prefilled pen and a cartridge refill?
A prefilled pen arrives as a complete unit filled with one compound and is used until the cartridge is empty. A cartridge refill is just the filled cartridge — it snaps into the reusable Ares Precision Pen you already own, which lowers the cost of every pen after the first.
How long do pen orders take to ship?
Pen fills are built to order in our lab. Allow 7–10 business days for assembly before the order ships. Pen hardware — the Ares Precision Pen, starter kit, needles and empty cartridges — ships from stock. When an order mixes formats, the whole order ships together once the pen is assembled.
Which compounds are available in pen format?
Every injectable compound in the Ares catalog can be supplied as a prefilled pen or a cartridge refill, at any of the vial sizes listed on that product page. GLP-3RT is the most requested pen fill. Capsules, nasal sprays, topical solutions and research-support items are not available in pen format.
Can I put more than one compound in a single pen?
No. Each cartridge is filled with a single compound so the batch COA, concentration and stability profile stay unambiguous. Researchers running more than one compound use one pen per compound, or one reusable pen with separate cartridges.