The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
And then the other thing I'll say is that like um the data that creatine actually increases muscle mass was never actually that good. Like there was always like the the prior studies that we have are like very small changes in muscle mass.
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I've been recommending this to patients for 6 months now. The big shift is patients actually do it because the explanation is concrete.
Same in nutrition counseling. The before/after framing helps.
Tracking with a CGM on top of this for 3 months. Variability dropped quickly and stayed dropped.
Worth noting the 0.71 SMD in the Kreider meta is in trained athletes. Effect in untrained adults runs closer to 0.3 — still meaningful, but the panel should reflect that gradient.
Good catch. Could the brief surface the training-status interaction inline?
So So what do you guys think? It's interesting. Well, what I'll tell you is I think the most interesting about the study is they they actually tested um the washin period which is what they call it. So, if you're familiar with creatine, like the the classic gym style, like gym bro style to use it is to do this like 20 gram um uh ramp up for like five or seven days, right? And during that time frame, you um you basically like saturate the muscles with creatine. And why that's important is because when you when you increase creatine in your body you increase the amount of fluid in your body as well. So what this study tried to do was account for that by measuring the the lean muscle mass or the lean body mass um at zero days and then 7 days in and they call that the washin period, right? Because there's a a change in those people who are on creatine because they're holding on to more fluid, right? And then after that is when they started their study. And then they did a 12-week study where um everybody did the same training plan. And then one group did did creatine and one group did not take creatine. Um, so what's interesting is like they accounted for the extra water weight that you take on when you start creatine. Um, and the difference that that amounted to, at least for this study, as compared to other studies that have looked at muscle mass, is they found no change in the creatine group as opposed to prior studies that found change, but the the theory is they found change because they didn't include this washing period basically.
And any early weight gain from creatine likely came from water retention and not real muscle.
5 g of creatine monohydrate daily improves muscle strength and lean mass in healthy adults at standard training loads.
Creatine improves cognitive performance, especially under sleep deprivation and high cognitive load.
Creatine improves cardiovascular health markers and reduces all-cause mortality risk.
Creatine supports bone-mineral density in post-menopausal women when paired with resistance training.
Women need higher creatine doses (8–10 g/day) than men to reach the same intramuscular saturation.