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Creatine on a GLP-1: what the evidence actually says
The kidney myth, the scale bump nobody warns you about, and the one honest limitation. Seven pages, fully cited.
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What is inside
- What creatine does, and why it needs resistance training to do anything at all
- The meta-analysis in older adults: +1.37 kg more lean tissue than training alone
- The ISSN safety position, quoted precisely rather than paraphrased
- The kidney myth, and why your creatinine lab value moves without your kidney changing
- Why the scale rises in the first weeks, and why that number is not fat
- What to buy, and why the exotic forms carry a price premium and a thinner evidence base
- The honest limitation: no published trial has tested creatine specifically in GLP-1 users
What the evidence says
- +1.37 kg more lean tissue mass than resistance training alone, in a meta-analysis of older adults.
- The ISSN position stand finds no compelling evidence of harm in otherwise healthy people at intakes studied up to 30 g/day for five years.
- Controlled trials show no harm to kidney function in healthy people; the creatinine rise is a measurement artifact.
Every substantive claim in this mini-guide is cited to peer-reviewed research or a registered clinical trial, with live links. Where the evidence is thin, mixed, or extrapolated from a different population, the guide says so instead of rounding up.
Frequently asked
Is creatine safe to take with Ozempic or Mounjaro?
There are no published trials of creatine specifically in people taking GLP-1 medications, so nobody can answer this from direct evidence, and any source claiming otherwise is overstating the literature. What is established: the ISSN position stand concludes there is no compelling evidence that creatine monohydrate harms otherwise healthy individuals at intakes studied up to 30 g per day for five years. If you have kidney disease or another significant medical condition, ask your clinician before starting.
Does creatine damage your kidneys?
Creatine raises serum creatinine, which is a marker clinicians use to estimate kidney function, simply because creatine converts into creatinine. The marker moves; the kidney has not changed. A narrative review concluded that controlled trials show no harm to kidney function in healthy people. Tell whoever orders your bloodwork that you take it, so an unexplained creatinine bump does not trigger an unnecessary workup.
Will creatine make me gain weight on a GLP-1?
Creatine draws water into muscle cells, and weight gain is the only consistently reported side effect in the ISSN position stand. Expect a small, fairly rapid rise in scale weight over the first days to weeks. It is water held inside muscle, not fat regained, which matters when the scale is your main feedback loop.
Prefer to read the evidence first? Is creatine safe to take with Ozempic? is our free, fully-cited explainer on the research behind this guide.
Creatine on a GLP-1
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