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c/tirzepatide·posted 6 months ago by u/piotr_nascimento

how much of what we believe about GIP actually comes from SURMOUNT threads

Lab Sourced ×5 Long Haul ×1 Slow Clap ×3

Trying to get a straight answer on this: how much of what we believe about GIP actually comes from SURMOUNT threads.

On comparing yourself with the trial number.

SURMOUNT-1 reported roughly 21% mean body weight change at 72 weeks on the highest arm. Three things get dropped every time that figure is quoted here. It is a mean, and the distribution around it is very wide. It is 72 weeks, which is a year and a half. And it is a trial population with trial support, which is not the same as a person with a spreadsheet.

Use it as a rough shape, not a benchmark. A 12% year is inside the ordinary range and people quit over it every week on this board.

The step schedule question, answered properly, because it comes up weekly.

The label sets a minimum interval of four weeks between increases. That is a floor on how fast you may go, and it exists because tolerability, not efficacy, is what limits most people. There is nothing in the pharmacology that says you must increase at four weeks, or at eight, or ever.

What decides it in practice is whether the effect you want is still there. If appetite is quiet and the trend is going the right way, the dose is doing its job. If both have genuinely gone flat for six weeks or more, that is a conversation worth having with someone who knows your history.

Week 10 was the first time the scale moved after a five-week stall. I changed nothing in that window.

That is everything I have. The rest is opinion and I have tried to keep it out.

20,389 up / 14,838 down58% upvoted57 commentsid 1ub4is14 Jan 2026

57 comments

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u/rania_marchand662 points·6 months ago·edited

Weekly dosing again, half-life in the same neighbourhood as sema, so a step change takes about a month to reach steady state. Judging a new step at day five is judging noise.

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u/piotr_nascimento519 points·6 months ago·edited

SURMOUNT-1 ran 72 weeks with the top arm around 21% mean body weight change. SURPASS is the diabetes programme and reports glycaemic endpoints, so quoting the two interchangeably is a category error.

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u/incretin_ivypharmacology330 points·6 months ago

Correction to my own post above — I said 2.5mg and I have been on 15mg since the spring. Same argument, wrong number.

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[removed]154 points·6 months ago

[removed by moderator]

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u/piotr_nascimentoOP0 points·6 months ago

What step are you on and how long have you been there?

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u/dario_stanescu0 points·6 months ago

Cosigning the four-week thing. It is a minimum interval, and treating it as a schedule to keep up with is how people end up miserable at 12.5.

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u/elin_varga-34 points·6 months ago

What is the waist doing? That is usually the number still moving during a scale stall.

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u/tove_vasquez1 point·6 months ago

Agree. The GIP component is the interesting half and it barely gets discussed outside c/glp1science.

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u/tidy_vialdrawer_pls1 point·6 months ago

Agree.

Not sure about this bit. The GIP arm being real does not tell you that it is what caused your particular week.

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u/forest_plot_fionastats1 point·6 months ago

Went 10 to 12.5 on the calendar and had the worst fortnight of the whole run. Dropped back to 10 and everything settled.

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u/titration_marshalmod · c/semaglutide1 point·6 months ago

Careful with "everyone tolerates it better". The people it did not suit stop posting, which makes this board look calmer than the drug is.

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u/rania_diallo1 point·6 months ago

I would separate the two claims. That the GIP arm exists is uncontroversial; that it explains your injection-site soreness pattern is a guess.

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u/nabila_ogunleye1 point·6 months ago

I would separate the two claims.

Saving this one. It is the clearest statement of the stall problem I have read here.

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u/throwaway_wl20261 point·6 months ago

a lot of people plateau nicely at 10mg and never need 15

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u/nordic_pricing1 point·6 months ago

The thing nobody warned me about was how much of this is logistics — storing it, remembering it, the same day every week.

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u/copay_card_cc1 point·6 months ago

the four-week step schedule is the label, not folklore

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u/piotr_nascimentoOP1 point·6 months ago

That percentage is body weight change, not body fat. Different measurement, and the distinction gets lost every time.

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u/emil_okwuosa246 points·6 months ago

dual agonist, so the GIP arm is doing something the sema threads will not tell you about

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u/cormac_pereira128 points·6 months ago

Does food noise follow the day after the shot, or is it spread across the week?

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u/piotr_nascimentoOP58 points·6 months ago

Held 7.5 for five months. Everyone kept asking when I was going to 10. The answer was never, because 7.5 was working.

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u/zeynep_zielinski41 points·6 months ago

Came off sema and onto tirz with a two-week gap. The first month was flat and I assumed I had made a mistake. Month two it moved.

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u/aurel_lindqvist203 points·6 months ago

stepping every four weeks is a ceiling on speed, not a schedule you must hit

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u/dario_vermeulen83 points·6 months ago

Same experience with the appetite effect being flatter across the week rather than front-loaded.

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u/incretin_ivypharmacology63 points·6 months ago

sulphur burps are the signature complaint and they are not dangerous

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u/tove_vasquez141 points·6 months ago

2.5mg is a four-week starting dose, not a maintenance dose. Worth being precise since people search these threads.

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u/yusuf_ramos195 points·6 months ago

Appetite effect for me is flat across seven days. On sema it was a wave. Same person, different molecule.

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u/titration_marshalmod · c/semaglutide96 points·6 months ago

Push back: "gentler than sema" is a population statement. Plenty of people on this board have the opposite experience and they are not doing it wrong.

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