Retatrutide (GLP3-R) vs Tirzepatide (GLP2-T)

Comparing Retatrutide (GLP3-R) and Tirzepatide (GLP2-T) — both made in America from raw material to finished vial, with 100% domestic manufacturing, packaging and shipping. This research-use reference summarizes how each is classified and what each has been studied for.

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Quick answer

Reviewed by PX1 Research scientific team

Key takeaways

Retatrutide (GLP3-R) is a triple-receptor agonist.
Tirzepatide (GLP2-T) is a research peptide.
Both Retatrutide (GLP3-R) and Tirzepatide (GLP2-T) from PX1 are made in America from raw material to finished vial, with 100% domestic manufacturing, packaging and shipping, with ISO 17025 third-party COAs available.

Retatrutide (GLP3-R)

Retatrutide (GLP3-R) is a triple-receptor agonist. Investigated across GLP-1/GIP/glucagon pathways for energy expenditure, insulin sensitivity and metabolic regulation. Our Retatrutide (GLP3-R) is made in America from raw material to finished vial, with 100% domestic manufacturing, packaging and shipping and third-party COA tested.

Tirzepatide (GLP2-T)

Tirzepatide (GLP2-T) is a research peptide. Supplied as a research-grade compound for in-vitro and laboratory investigation. Our Tirzepatide (GLP2-T) is made in America from raw material to finished vial, with 100% domestic manufacturing, packaging and shipping and third-party COA tested.

Sourcing & Quality

Both Retatrutide (GLP3-R) and Tirzepatide (GLP2-T) from PX1 are made in America from raw material to finished vial, with 100% domestic manufacturing, packaging and shipping, with ISO 17025 third-party COAs available. All material is sold for laboratory and research use only — this page does not offer medical guidance or dosing.

Frequently Asked Questions

What is the difference between Retatrutide (GLP3-R) and Tirzepatide (GLP2-T)?

Retatrutide (GLP3-R) is a triple-receptor agonist; Tirzepatide (GLP2-T) is a research peptide. Each has a distinct research profile — see the sections above.

Are both made in the USA?

Yes — both are made in America from raw material to finished vial, with 100% domestic manufacturing, packaging and shipping and ship with third-party COAs available.

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All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.