LearnRetatrutide 20mg vs 30mg vs 50mg
Research overview
Retatrutide 20mg vs 30mg vs 50mg
Reta GLP-3 (retatrutide)
Three fills on the Reta GLP-3 card. Same compound in every vial, just more of it as you go up.
Heads up: this is product info for lab and research use only. It isn't medical advice, and it doesn't diagnose, treat, cure, or prevent any disease.
One card, three sizes
We list retatrutide as Reta GLP-3, a lyophilized research vial in Metabolic. The card has a size picker with 20mg, 30mg, and 50mg. It's the same compound in every vial. Only the amount changes.
For background on the compound, see What is retatrutide?. If you're weighing it against tirzepatide, that's a different page: Reta GLP-3 vs Tirzepatide GLP-2.
How the sizes line up
- 20mg: the default size on the card, and the one most people start with.
- 30mg: one and a half times the 20mg.
- 50mg: two and a half times the 20mg, the largest fill we list.
A bigger fill isn't a stronger version. It's more material in one bottle. If you're working out concentrations, the reconstitution calculator takes the mass and a volume and gives you mg/mL. For example, 20mg in 2 mL is 10 mg/mL, and 50mg in 2 mL is 25 mg/mL. That's arithmetic, not a method.
Choosing a size
The trade-off is the usual one. Larger vials cost more up front but less per milligram, and you open fewer of them. Smaller vials cost less to buy and suit smaller projects. Current prices for each size are on the Reta GLP-3 card.
Other Metabolic listings, like Tirzepatide GLP-2, Tesamorelin, and MOTS-C, are different compounds rather than other sizes of this one.
Testing notes
Reta GLP-3 is third-party tested. The 20mg card links a Janoshik lab report for that lot, which you can check on Janoshik's own verify page. When we post a report for another size, it shows up on the product page too. How to read a COA explains what a report like that covers.
Quick answers
Is retatrutide 50mg a different product from 20mg?
No. It's the same compound. The 50mg vial simply holds two and a half times what the 20mg holds. All three sizes sit on one Reta GLP-3 card with a size picker.
Why is it called Reta GLP-3?
It's our shop name for retatrutide. Research writeups describe retatrutide as working across three receptor targets (GIP, GLP-1, and glucagon), and the GLP-3 name is shorthand for that. Tirzepatide, which writeups describe around two targets, is listed here as Tirzepatide GLP-2.
What if the size I want is sold out?
The product page shows a back-in-stock sign-up for any size that's out. Leave your email and we'll let you know when it's back.
Related listings
Nearby catalog cards for what this page covers.
This is product information, not medical advice, and not a prescription. Nothing here diagnoses, treats, cures, or prevents disease. Talk with a licensed clinician before using any peptide or booster.