What I have: 12 mg · retatrutide.
I would rather over-plan the first cycle and simplify later.
I am prepared to do the work if someone can tell me which work matters.
How do I make this decision on evidence rather than on feel?
12 mg a week is 1.714 mg a day averaged out and 624 mg over a year — but "defensible" is not a property of the number, it is a property of where the number came from. A maintenance dose is defensible when a trial randomised people to it and reported what happened, and indefensible when it was arrived at by interpolation between two doses that were studied. So the question to ask of 12 mg is which arm it corresponds to: if a programme ran 12 mg as a maintenance level, there is an efficacy figure, a tolerability figure and a discontinuation rate attached to it. If it sits between two studied levels, everything said about it is extrapolation, and the burden of that is on whoever proposed it. The other half of the arithmetic is supply: at 12 mg a week a 10 mg vial is 0.83 weeks and you will need about 63 of them a year, which is worth knowing before the dose is settled rather than after. Maintenance doses are set by a prescriber against an individual; nothing here is medical advice.
The honest answer is that the maintenance dose is individual and that the search for it is slow because the feedback is slow.
Maintenance and loss are different endpoints. Loss requires a sustained energy deficit; maintenance requires only that the counter-regulatory drive is offset, and that may need less exposure.
In practice, glycaemic maintenance has a faster and cleaner signal than weight maintenance, particularly with continuous monitoring, which makes the downward search more tractable when glycaemia is the endpoint.
STEP-4 and SURMOUNT-4 evaluated withdrawal rather than dose reduction, which is the limit of the direct evidence on this question.
Inference from the withdrawal trials to dose reduction is inference and should be labelled as such.
Search downward, one step, eight weeks each, on a rolling average.
Aggregated, published test results and vendor ratings built from submitted batches. Methodology stated, dataset browsable, no listing fees.
Browse resultsAny reduction takes four to five weeks to express itself, so the search proceeds in months.
If the result deteriorates on a lower dose, returning to the previous one is straightforward and does not require re-titration from the bottom provided the gap has been short.
Gastrointestinal tolerability generally improves on a reduced dose, which is a genuine quality-of-life argument for the search rather than only a cost one.
A noisy weight signal makes premature conclusions easy, in both directions.
The withdrawal trials answer stopping, not reducing. Different questions.
edited 15 Jul 2025 by sample_id — removed a claim I could not source
Ask PeptideStack is a static archive. Posting is closed, but the norms are worth stating: answer the question that was asked, show your working, cite the trial or the certificate, and say plainly where the evidence runs out.