11:05
creatine
Physionic (Dr. Nick) reviews two claims Dr. Rhonda Patrick made on the Huberman podcast — that brain creatine uptake requires doses well above the standard 5g muscle dose, and that a single very high dose of creatine can protect cognitive performance during sleep deprivation — and finds both largely correct, though the specific '10g threshold' Patrick cites is traced to a study that actually used 20g.
Dr. Patrick makes two primary claims: (1) more than a muscle-centric ~5g dose of creatine is needed to raise brain creatine stores; (2) very high creatine doses during stress/sleep deprivation can fully recover cognitive function.
Muscle tissue is described as 'greedy' for creatine, consuming supplemented creatine at standard ~5g doses before it meaningfully reaches the brain.
Patrick attributes the brain-creatine-rising-at-~10g claim to a German study; Physionic identifies the actual study (Tübingen, Germany, ~30 years old) as having used 20g, not 10g.
That 20g/4-week split-dose study showed brain creatine rising from baseline to week 4 via imaging, and falling by week 16 after creatine was stopped; Physionic notes it was small and had no control group, though other small placebo-controlled studies confirm the pattern.
A separate placebo-controlled study in adolescent girls with treatment-resistant depression tested 2g, 4g, and 10g creatine over 8 weeks, measuring phosphocreatine; the 10g group had the largest raw increase but no statistically significant difference was detected across conditions.
Physionic's synthesis: across multiple small, specialized studies, 10g appears insufficient to reliably raise brain creatine, with more evidence pointing to 20g or more as the more robust target.
Patrick's sleep-deprivation claim is based on a single-dose (not repeated), placebo-controlled study using 0.35 g/kg of creatine (roughly 20-28g+ depending on body weight) given to subjects sleep-deprived for 21 hours.
Physionic confirms the dose and study details as accurate: creatine never performed worse than baseline on any cognitive test, and outperformed baseline on some measures.
Physionic states the finding even more strongly than Patrick: people who took creatine while sleep-deprived had better cognitive performance than people who were not sleep-deprived but had no creatine.
Physionic's overall takeaway: creatine is best supported at ~20g/day (or more) for raising brain levels, and a single 0.35 g/kg dose is well-evidenced for protecting cognitive performance during stress like sleep deprivation.
Patrick's own daily 'bedside' dose is stated as 10g, based on her reading of the German study.
Physionic credits Patrick for flagging that the underlying data comes from small studies, calling that an important and appropriate caveat.
The video teases (but withholds to paid content) further coverage of creatine's role in brain diseases like Alzheimer's and whether a lower maintenance dose can sustain elevated brain creatine.
The most commonly cited study for a '10g brain-creatine threshold' actually used 20g — meaning a specific dosing number circulating in health media appears to be a mis-citation even by a credentialed source, not just imprecise rounding.
Muscle acts as a competitive sink for supplemented creatine, which explains why typical 3-5g 'muscle' doses fail to meaningfully raise brain creatine — the bottleneck is systemic competition for uptake, not a brain-specific absorption failure.
In the acute sleep-deprivation study, creatine-supplemented sleep-deprived subjects didn't just avoid decline — on some measures they outperformed non-deprived, non-supplemented subjects, suggesting the acute cognitive-protective effect can exceed simply offsetting the deprivation.
Raw/absolute effect size and statistical significance diverge in the adolescent-girls 10g study: the 10g arm had the largest numeric increase in phosphocreatine, yet the difference across conditions didn't reach statistical significance — attributable to sample size, study length, or different statistical methodology than the 20g studies.
Because the protective sleep-deprivation dose (0.35 g/kg) scales with body weight, the effective dose varies substantially by individual — e.g., ~28g for an 80kg person versus ~20g cited for a 100kg podcast guest at a lower per-kg estimate — a quantity far above what casual creatine users typically take.
«I've only covered creatine about, I don't know, 10 times before, so I thought I would cover it just one more time.»
— 00:04
«Hey Michael, well, your brain makes it, and it's true. Your brain does make, you know, again, it's like I think between 1 to 3 g or something.»
— 01:11
«if you look by MRI, you can start to see that creatine levels are increasing in certain brain regions»
— 01:57
«This study, done in Tübingen, Germany, did not use 10 g of creatine. They used 20 g.»
— 02:22
«As it stands, across multiple, albeit small and specialized studies, 10 g may be insufficient in raising brain creatine levels, with more evidence pointing to 20 g or even more being a more robust target, although it may still be fallible.»
— 05:18
«the 10 g of creatine a day, which is now what my bedside is, is based off of that.»
— 05:41
«if you give individuals that high dose in that, you know, sleep deprived state, that they're cognitively not only performing normal, but they're performing better than their baseline.»
— 06:42
«People who consume creatine had better brain performance when they were sleep deprived and saturated in creatine than when they were not sleep deprived but didn't have creatine. Think about that.»
— 09:08
«Dr. Patrick does a great job, though the 10 g used could be called into question. The rest is pretty spot on.»
— 09:57
Reception
Mostly positive reception with engaged viewers sharing creatine benefits and testimonials, tempered by one highly-liked skeptical comment and constructive criticism about study rigor.
Physionic largely validates Dr. Patrick's claims: the specific '10g' figure she cites traces to a study that actually used 20g, so the brain-creatine dosing target is better framed as ~20g+ rather than 10g, but her core points — that muscle competes for standard-dose creatine and that a single high dose can protect cognition during sleep deprivation — are supported by the studies reviewed, with Physionic stating the sleep-deprivation finding even more strongly than Patrick did.
11:05