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Evidence-based GLP-1 & peptide discussion since 2023
ForumsRetatrutide & Triple AgonistsWill reta make sema and tirz obsolete? Page 2

Will reta make sema and tirz obsolete?

andrew_nyc Thu, Jan 8, 2026 at 9:23 AM 33 replies 1,028 viewsPage 2 of 7
HPLC_Greg
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Jan 8, 2026 at 12:13 PM#6
SarahChen_PharmD said:
— in my experience this comes down to a few key factors

I respect SarahChen_PharmD perspective but I think this oversimplifies things a bit. Re: Will reta make sema and tirz — the subgroup analyses show meaningful heterogeneity.

I am not saying SarahChen_PharmD wrong entirely — just that the picture is more nuanced than a blanket statement. The SURMOUNT data specifically shows baseline BMI-dependent responses.

42 17SallyK_inj, CryptoCarl, MariaRD and 39 others
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lucas_SP_BR
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Jan 8, 2026 at 12:30 PM#7

Relevant to Will reta make sema and tirz — here is my latest bloodwork comparison:

Key improvements: A1C 7.6% → 5.5%, triglycerides 225 → 95 mg/dL, hsCRP 8.0 → 1.3 mg/L. All on tirzepatide for 17 months.

The inflammatory marker drop is what impresses me most. Consistent with the SELECT trial's cardiovascular findings.

21 4Dr.ObesityLA, NurseKim_ATL, paul_denver and 18 others
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AttorneyGrant
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Jan 8, 2026 at 12:47 PM#8

Thank you NurseKim_ATL! This is incredibly helpful. Taking this to my next appointment. 🙏

21 6JenMemphis, pat_auckland, Dr.GastroMayo and 18 others
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tampaLisa73
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Jan 8, 2026 at 1:04 PM#9

Slightly tangential to Will reta make sema and but LeilaHI reminded me — does anyone have experience combining this with metformin?

I know it is not exactly on-topic but it seems related enough to ask here rather than starting a new thread. Apologies if this has been covered — I did search first.

2 20mike.trainer_LA, sarah_nash92
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Admin
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Jan 8, 2026 at 1:21 PM#10

Moderator note: Great discussion, everyone. Just a reminder to keep things civil and evidence-based.

Thread quality is excellent — keep it up. 👍

33 20PeptideSynthNJ, Dr.KarenChen, Dr.NateNeph and 30 others
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