SA Tirzep and SA Reta are names in SA listing artwork: Tirzep refers to tirzepatide and Reta to retatrutide. The substances differ in mechanism and development status; pen and vial identify pictured formats.
Four names found in the original material
Tirzep, Tirzep Pen, Reta and Reta Pen are four artwork labels, not confirmation of complete verified labels or approval. The original SA Tirzep listing information identifies a carton and vial; it does not establish the identity of the separate Pen listing.
Substance differences
Tirzepatide acts at GIP and GLP-1. Retatrutide is studied at GIP, GLP-1 and glucagon receptors and is still described by Lilly as unapproved. This explains substances, not SA contents.
Evidence separate from promotional artwork
Artwork identifies names, but embedded purity, safety or outcome claims are not product test results. Verify the label, manufacturer documentation and the presentation being discussed.
Frequently asked questions
Are Tirzep and Reta the same substance?
In this article they refer to different substances: tirzepatide and retatrutide.
Do pen and vial identify strength?
No. They describe format; strength requires the specific product label.
Does the image verify SA quality?
No. Promotional artwork is not quality testing or drug-registration evidence.
Read next
What is tirzepatide? Medicine names, mechanism and listing differences · What is retatrutide? Mechanism, evidence and listing names · Tirzepatide Tirzep SA Anabolic
Sources
Information checked 10 September 2026. Research and medicine labels above are separate from evidence for this listing image.
For general name or label questions, contact LINE: @musclestationth
Source images identify presentations; they do not establish product quality or approval. Reta Pen is shown as an illustration.