Register

Dr. Stacy T. Sims@drstacysimsInstagram

“Is creatine safe for my kidneys?” It is probably the most common question we get. The answer is not to ask

… more

what it claims

To assess the safety of creatine for your kidneys, do not rely on generic internet answers: examine your health history, get a health screening, review your other supplements, and consult a healthcare professional to confirm that this choice is appropriate for your individual profile.

holds up

The recommendation to personalize the use of creatine based on one's profile is particularly relevant and scientifically sound.

noli's read

The recommendation to personalize the use of creatine based on one's profile is particularly relevant and scientifically sound. A meta-analysis published in BMC Nephrology (2025) confirms, based on multiple randomized controlled trials (RCTs), that creatine is perfectly safe for kidney health in healthy, active adults. However, as highlighted by expert reviews from the Mayo Clinic or the platform Examine.com, this safety does not automatically apply to individuals with pre-existing renal sensitivities or those taking other active supplements. Furthermore, an initial biological assessment allows for monitoring one's markers with peace of mind, without being alarmed by a natural and benign rise in creatinine linked to the product's assimilation. Stacy Sims' invitation to prioritize personal context over absolute truths is therefore entirely accurate and aligned with scientific data.

the sources

1NIH Office of Dietary Supplements 2026

Claimed by Dr. Stacy T. Sims. Noli grades the claim, never the person.

Decoded by Noli · July 13, 2026 · the original post

What the graded evidence says

Evidence: A

Effect: strength/power with resistance training — consistent small-moderate benefit
Measured on: healthy training adults

Dr. Stacy T. Sims in the Register43 claims graded · solidity 81/100See their record →

More from Dr. Stacy T. Sims

Women naturally possess lower creatine stores than men and should therefore prioritize high-purity supplementation, free of impurities, to optimize its benefits for muscle, brain, and gut health.

mixedDr. Stacy T. Sims

To optimize metabolic vitality and sleep quality, active women should consume sufficient calories during the day, fuel before physical exertion, and break their overnight fast early in the morning (morning breakfast) rather than delaying it until noon.

holds upDr. Stacy T. Sims

The decline in estrogen during menopause reduces the diversity of our gut bacteria and disrupts the estrobolome, which promotes weight gain and negatively influences metabolism.

mixedDr. Stacy T. Sims

Others on this

The buzz from a Monster Energy comes almost entirely from its caffeine (and the sugar riding along with it) — the taurine and the B-vitamin megadoses on the can don't add a proven benefit beyond that.

mixedscience.snitch

Extreme, prolonged sun deprivation — like months aboard a nuclear submarine — is exactly the scenario where routine vitamin D supplementation makes real sense: several studies on submarine crews (Royal Navy, US Navy) show levels drop markedly within weeks without it.

holds upPaul McNally

For women in their 20s: four basics are enough — omega-3, vitamin D3, magnesium glycinate, and a quality probiotic — rather than 15 supplements.

mixedThebiohackingrn

Noli has read similar claims

Other advice in the Register that leans on the same research.

Creatine isn't just for muscle — at doses higher than the standard 3-5g, some reaches the brain and may support cognitive energy, especially under stress or sleep loss.

mixedThe Diary Of A CEO - With Steven Bartlett

5g of creatine isn't enough, the claim goes: bumping to 10g raises brain creatine further, and a 25g dose counters the cognitive decline from sleep loss and the mid-afternoon energy crash.

mixedFoundMyFitness Clips

After a year of daily creatine monohydrate: no hair loss, no kidney damage, the loading phase isn't necessary, and "special" creatine forms change nothing versus plain monohydrate.

holds upCaptain Workout

Noli, a firefly holding its lantern, at rest

Seen something like this? Send it to Noli.

Paste any health post from TikTok, Instagram, YouTube or X — or the advice itself, if someone just told you. About ten seconds, no account needed.