CommunityNews & Policy

New quintuple agonist from Eli Lilly! So new it is not yet named.

7 replies6 peopleApr 23, 2026☆ Follow
Summary

What does the new unnamed quintuple agonist from Eli Lilly add beyond retatrutide and how do amylin and calcitonin fit in?

The thread covers an early video on an unnamed Eli Lilly compound that layers amylin and calcitonin activity onto GLP-1, GIP and glucagon agonism. Participants note amylin supplies extra satiety and gastric slowing while calcitonin targets bone density, though one poster argues calcitonin adds nothing useful for weight loss. Doubts surface about whether complex multi-agonist peptides can be made reliably at scale.

What this discussion establishesWhere people disagree

Whether calcitonin receptor agonism helps, hinders, or has no effect on weight-loss outcomes.

Still open

How the company combined structurally dissimilar amylin and GLP-1-family peptides into one molecule, and whether current synthesis methods can reliably produce it.

Nothing here is advice.

7 replies · 6 people
AmberAnchor83archiveopening postApr 23

Saw a short video on this still-unnamed compound. Eli Lilly appears to be adding focus on satiety and bone health. Anyone familiar with amylin or calcitonin? They seem to be the extra pieces beyond the GLP-1, GIP and glucagon already in retatrutide. Quick reading suggests amylin gives satiety on par with cagrilintide, slows gastric emptying more, supports bone remodeling, and oddly suppresses glucagon even though glucagon is also in the mix. I figure the glucagon suppression is just a side effect rather than a goal, since supplemental glucagon should still deliver its own benefits during fasting or hard training. Calcitonin appears to reduce blood calcium and help maintain bone density.

LevelThistle44archiveApr 23

I've been wondering if amylin is similar to cag or eloralintide.

AmberAnchor83archiveApr 24

From the limited reading I did, amylin does seem to give satiety similar to cagrilintide.

BrightMeadow44archiveApr 24
↳ replying to @AmberAnchor83 (opening post)

That's because cagrilintide basically is amylin, just modified to last longer. For practical purposes they work the same.

GreenBeacon77archiveApr 24

Clearly they are going to seek biologic status for this one too simply to preserve their earnings.

SlowLedger42archiveApr 29

I lack your courage here. When molecules become increasingly intricate, I grow less sure that typical labs in China will produce the genuine substance rather than a variant that mimics it in routine analyses while being chemically distinct. The chain of supply conceals the original manufacturer through intermediaries who select the most affordable materials from processors that meet basic quality checks, meaning even a trusted provider could deliver differing results in successive lots.

KeenPebble33archiveApr 29
↳ replying to @AmberAnchor83 (opening post)

The whole idea of hitting five receptors at once feels like mostly hype since going after calcitonin does nothing to help drop weight and might even work against it. One compound that hits both amylin receptors and calcitonin only reaches about half the results of another that stays strictly on the amylin side. That leaves the calcitonin piece with no real role either on paper or in practice. Still the overall compound looks intriguing to me. I keep wondering how the design works when the shapes of amylin and the glp-1 gip glucagon pieces differ so much. Seeing how it all fits together in detail would probably clear that up.

KeenPebble33archiveApr 29
↳ replying to @SlowLedger42

I see your point. There's a chiral center in those meds that mass spectrometry can't pick up, as you said. That means we could be receiving a mix of both forms without realizing it. Not sure about any of this. Would be interested if others have details on the topic. Could that explain why the other one isn't available yet? It contains extra unnatural amino acids along with those centers and a sulfur bridge. Still unsure. The similar one has that bridge too yet it appears fine. Anyone with insight on the difference?

Add your experience

If you have tried it, this topic is still open. Sign in to reply — it takes a minute.

New quintuple agonist from Eli Lilly! So new it is not yet named. · ZyraTrack Community