Do Experts Agree on Creatine for Muscle Growth?

Yes. Experts broadly agree that creatine monohydrate helps build muscle when combined with resistance training. The trial record supports small added gains in strength and lean mass over training alone. Experts disagree mainly on dose beyond 5 grams a day and on newer claims about brain and bone benefits.

What the trials show

Creatine plus resistance training beats training plus placebo by a small, repeatable margin. Creatine without training does not build meaningful muscle. The training is the intervention; creatine adds to it.

Chilibeck and colleagues (2017) pooled 22 randomized trials with 721 participants aged 57 to 70, training two to three days a week for 7 to 52 weeks. Creatine groups gained 1.37 kg more lean tissue than placebo, with greater chest press and leg press strength. Read that honestly: about 1.4 kg of extra lean tissue across a program is real, and it is not a transformation. Younger adults show the same direction, with about 1.14 kg more lean mass than placebo in a 2024 meta-analysis. The International Society of Sports Nutrition position stand (Kreider et al., 2017) concluded that creatine monohydrate is the most effective legal supplement for high-intensity exercise capacity and lean mass during training, at 3 to 5 grams a day.

Two cautions belong in any citation of these numbers. Most trials measure lean mass by DXA, which counts water as lean tissue, and creatine pulls water into muscle. Studies measuring muscle thickness directly still find a small real increase, which is why we grade the claim strong, but the DXA headline overstates tissue gain. And the popular 10 gram figure traces in part to a 2025 Texas A&M trial whose lean mass result was also DXA based. It does not establish that 10 grams beats 5 grams.

On dose, physiology sets a ceiling. At 3 to 5 grams a day, muscle stores saturate in about 3 to 4 weeks (Hultman et al. showed 3 grams a day reached the same saturation as loading at 28 days). Loading at about 20 grams a day for five to seven days reaches the same point faster, then drops back to the daily dose. Loading is optional. Once stores are full, extra creatine leaves in the urine, largely as creatinine. Our graded dose is therefore 3 to 5 grams a day of creatine monohydrate. The case for more rests on brain claims our record grades emerging: small studies, including single-dose experiments under sleep deprivation, not a replicated daily protocol.

On safety, the ISSN position stand found no evidence that creatine at studied doses harms kidneys or liver in healthy adults. The hair loss claim rests on one small 2009 study in rugby players reporting higher DHT; it has not been replicated, and no trial has shown hair loss as an outcome.

What the experts say

Andrew Huberman takes creatine daily: "What is the threshold level of creatine to supplement in order to get the cognitive benefit? [It] appears to be at least five grams per day" (Men's Journal, September 2025).

Rhonda Patrick takes 10 grams a day on the strength of the emerging brain, bone, and immune claims: "5g is enough to saturate muscles, but around 10g/day benefits brain, bones, and immune system as well" (from a secondary tracker of her supplement list, labeled as such). She raises the dose to 15 to 20 grams when sleep deprived.

Layne Norton, citing a 2025 analysis by Kreider and colleagues covering more than 250 studies and 26,000 participants, concludes on safety: "The verdict? Absolutely no evidence of harm."

Andy Galpin recommends 3 to 5 grams a day, taken daily with no cycling, and frames creatine as a lifespan supplement rather than a young athlete supplement (Momentous education page, January 2026).

Gary Brecka is the outlier on form: he takes 1.5 grams of liposomal creatine daily, while noting most people can use 3 to 5 grams of standard monohydrate (secondary tracker; no direct quote on file). No head-to-head trial compares his form and dose against standard monohydrate.

The split, plainly: nobody here disputes the muscle claim or the 3 to 5 gram base dose. The disagreement is Patrick's higher dose, which bets on outcomes the record has not confirmed.

Our grade and rationale

Longevity Lab Report grades creatine A- on evidence and A on worth it, at $5 to $10 a month for plain monohydrate.

The A- rests on the size and consistency of the trial base for strength and lean mass with resistance training, plus a safety record covering tens of thousands of participants. It stops short of A because the cognitive claim now attached to creatine is still emerging evidence, and a grade should not borrow strength from a claim that has not earned it. The worth-it A is arithmetic under our methodology: strong evidence, broad use for anyone who resistance trains, and one of the lowest costs in our database. Costlier forms (liposomal, buffered, hydrochloride) have not shown better outcomes than monohydrate.

Safety and interactions

Kidney disease: talk to your doctor first. Healthy kidney data does not transfer to impaired kidneys. Creatine also raises serum creatinine slightly, because creatinine is its breakdown product, so tell your clinician you take it before kidney-related bloodwork. GI upset is the most common real side effect, worst during loading; splitting the dose or skipping loading usually settles it. Expect 1 to 2 kg of early scale weight from water held in muscle. That is the mechanism, not fat gain.

Grades are research summaries, not medical advice.