💉 Vial, 👃 nasal spray or 👄 oral spray: formats explained
Last updated November 10, 2026
Same molecule, three formats. Only one of them has trial data behind it.
The three formats
Lyophilized vial
Freeze-dried powder in a sealed 10 mL vial. The classic research format and the most stable on the shelf.
Trial route: yesNasal spray
Pre-mixed solution in a 15 mL spray bottle. Nothing to prepare.
Trial route: no dataOral spray
Pre-mixed solution sprayed in the mouth. The simplest to handle.
Trial route: no dataHow the trials did it
Every figure quoted on this site comes from studies that used the same method: one subcutaneous injection per week, started at a low dose and raised in steps over several weeks under medical supervision. The slow escalation is there to keep digestive side effects manageable.
| Molecule | Route in trials | Frequency | Maintenance doses studied |
|---|---|---|---|
| Retatrutide (triple) | Subcutaneous injection | Once weekly | 4, 9 and 12 mg |
| Tirzepatide (dual) | Subcutaneous injection | Once weekly | 5, 10 and 15 mg |
Those are the doses the studies tested in supervised participants. They are not instructions. Research compounds are not medicines, and dosing for a person is a clinician's call with an approved product.
Format comparison
| 💉 Vial | 👃 Nasal spray | 👄 Oral spray | |
|---|---|---|---|
| Published human route data | Yes (injection) | None | None |
| Preparation | Powder, needs lab prep | Ready to use | Ready to use |
| Shelf stability | Highest (dry powder) | Lower (solution) | Lower (solution) |
| Price from | $76 | $220 | $145 |
| Our score | 4.7 to 4.8 | 4.2 | 4.1 |
Storage and handling
- 🧊 Keep lyophilized vials cool, dry and out of light.
- 🏷️ Match the lot number on the vial to its COA before use.
- 📅 Note the date a vial is opened.
- 🧤 Standard lab hygiene: clean surface, gloves, sterile materials.
FAQ
Which format did the weight-loss trials use?
All of them used a once-weekly subcutaneous injection given under a study protocol. None of the published trials used a nasal or oral spray.
Do nasal or oral sprays work the same way?
There is no published human data on how much of these compounds is absorbed from a nasal or oral spray, so nobody can say.
How should a lyophilized vial be stored?
Lyophilized research peptides are generally kept cool, dry and away from light. Follow the storage line on the product label and the lot COA.
Why is there no dosing chart on this site?
These compounds are sold for laboratory research and are not approved medicines. Dosing for a person is a decision for a licensed clinician with an approved product.