Creatine without exercise: what the new trial actually found
See more of CureMed in your Google results.
A new study said creatine added lean mass in people who did not exercise. It was small, and the scan it used counts water as lean mass. The strong evidence for creatine is in people who do strength training.
A 12-week trial from Texas A&M University reported that adults aged 45 to 65 who took 10 g of creatine a day without exercising gained 1.1 kg (2.4 lb) of lean tissue, while the placebo group did not. That comparison rests on 13 people taking creatine and 13 taking placebo. Lean tissue on a body scan includes water, which creatine is known to raise, and the trial did not measure water. Creatine with resistance training has a meta-analysis of 63 trials behind it; the no-exercise headline rests on this one small comparison.
- The trial: 73 sedentary adults aged 45 to 65 chose an exercise-and-diet programme or neither, then were randomly given creatine monohydrate (10 g a day) or a placebo powder for 12 weeks. 64 finished.
- No exercise: lean tissue rose by 1.1 kg (2.4 lb) on creatine and fell by 0.16 kg on placebo. Thirteen people in each group.
- With exercise: lean tissue rose by 1.27 kg on creatine and by 0.14 kg on placebo, and body-fat percentage fell further on creatine.
- The catch: a DXA scan counts the water in muscle as lean tissue. Controlled studies have found that creatine raises total body water, and with it the scan's lean reading. This trial never measured water.
- Who supplied it: a foundation gift funded the study; the creatine maker AlzChem supplied the powder, and the senior author chairs its scientific advisory board. Both are disclosed in the paper.
- For you: if you do resistance training, creatine has strong evidence. If you do not, one small trial is not a reason to expect muscle from a powder.
Graded by CureMed against human clinical evidence, and reviewed by CureMed Labs.
What the trial did
| What the paper reports | |
|---|---|
| Design | Randomised, double-blind and placebo-controlled for the supplement. Exercise was not randomised: each person chose it. |
| People | 73 healthy, sedentary adults aged 45 to 65 started and 64 finished: 40 women and 24 men, average age 54.5, average weight 84.5 kg, average BMI 29.9 |
| Supplement | Creatine monohydrate, 5 g twice a day (10 g a day), or a maltodextrin placebo, for 12 weeks |
| Exercise arm | Supervised resistance and aerobic training three times a week, 10,000 steps on the other days, and a reduced-calorie diet |
| Groups at the end | No exercise + placebo: 13 · no exercise + creatine: 13 · exercise + placebo: 18 · exercise + creatine: 20 |
| Measured | Body composition by DXA scan, bench-press and leg-press strength, treadmill fitness, memory and attention tests and blood markers, at 0, 6 and 12 weeks |
| Paid for by | A gift from the WoodNext Foundation to the Texas A&M Foundation. AlzChem, which makes creatine, supplied the supplements and paid for one blood assay. |
What it found
Lean tissue mass: change from the start, in kg
| Group | At 12 weeks | At 6 weeks | People |
|---|---|---|---|
| No exercise + creatine | +1.10 (0.2 to 2.0) | +0.99 (0.2 to 1.8) | 13 |
| No exercise + placebo | −0.16 | −0.09 (−0.9 to 0.7) | 13 |
| Exercise + creatine | +1.27 (0.56 to 1.98) | +1.69 (1.0 to 2.4) | 20 |
| Exercise + placebo | +0.14 (−0.6 to 0.9) | −0.11 (−0.8 to 0.6) | 18 |
The paper also reports gains in bench-press and leg-press strength in the no-exercise creatine group. It shows them in a figure and does not give the numbers in the text. The groups that trained gained more, and most of all on creatine.
Side effects were infrequent, mild and similar in all four groups, and nobody left the study because of the supplement.
Blood creatinine rose slightly on creatine, by less than 0.15 mg/dL. The kidney estimate that is calculated from creatinine dipped as a result and stayed in the normal range. The authors say this should not be read as reduced kidney function.
What the headlines left out
- Thirteen against thirteen. The no-exercise result compares 13 people on creatine with 13 on placebo. By the paper's own interval, the true gain could be as small as 0.2 kg or as large as 2.0 kg.
- A scan cannot tell muscle from water. DXA reports lean tissue, and the water held in muscle counts as lean tissue. In one experiment, two days of high-carbohydrate eating raised the scan's lean reading by 2.4 kg with no new muscle. Creatine raises total body water. This trial did not measure body water, and the paper does not discuss it.
- Nobody was assigned to exercise or to rest. People chose. The two halves of the trial are therefore different kinds of people, and only the powder was randomised.
- The no-exercise creatine group ate more. The paper reports that its energy and carbohydrate intake was higher than in the other three groups, and stored carbohydrate holds water too.
- The dose was high. The authors themselves describe 10 g a day as a higher dose.
- The powder came from a creatine maker. AlzChem supplied it, and the senior author chairs AlzChem's scientific advisory board. The paper discloses both and says the sponsors had no part in collecting, analysing or interpreting the data.
- It was registered late. The first participant enrolled in July 2024, and the trial was submitted to a registry in April 2025.
- The authors' own wording is careful. Creatine "may help" middle-aged and older adults maintain muscle mass and strength, they write, and the memory and blood findings "should be interpreted as exploratory".
What creatine with training has behind it
In September 2026 the same journal published a meta-analysis of creatine combined with resistance training: 63 trials and 1,489 people. Training plus creatine beat training alone on upper-body strength, lower-body strength and lean mass. The effects on strength were moderate, the effect on lean mass was small, and fat mass did not differ.
Source: Wang et al., Journal of the International Society of Sports Nutrition 2026;23(sup1):2718316, published online 21 September 2026; abstract read on PubMed on 6 October 2026.
What to do with this
- If you do resistance training, creatine monohydrate is a reasonable addition. That is where the evidence is, and this trial does not change it.
- If you do not exercise, do not expect a powder to stand in for it. In this trial the people who trained lost more fat and gained more strength, whichever powder they took.
- If you take creatine, tell whoever orders your blood tests. It raises creatinine, the marker used to estimate kidney function, without that meaning kidney damage.
- If you have kidney disease, or take medicines that affect the kidneys, ask a pharmacist or doctor before you start.
Frequently asked questions
Does creatine build muscle without exercise?
One small trial says it may add lean tissue: 1.1 kg (2.4 lb) over 12 weeks in 13 adults aged 45 to 65 who took 10 g a day and did not train. Lean tissue on a scan includes water, which creatine raises, and the trial did not measure water. It is not established that creatine builds muscle without exercise.
Does creatine work if you don't work out?
In one 2026 trial, people who took creatine and did not train gained some lean tissue and some bench-press and leg-press strength. The gains were larger, and are far better documented, in people who train: a 2026 meta-analysis of 63 trials found that creatine added strength and lean mass on top of resistance training.
How much creatine did the trial use?
10 g a day, taken as 5 g in the morning and 5 g in the evening, for 12 weeks. The authors describe this as a higher dose.
Is the lean mass gained on creatine just water?
Part of it may be. A DXA scan counts the water held in muscle as lean tissue, and controlled studies have found that creatine raises total body water and the scan's lean reading with it. The 2026 trial did not measure body water, so it cannot say how much of the 1.1 kg was water.
Who funded the creatine study?
A gift from the WoodNext Foundation to the Texas A&M Foundation. AlzChem, a creatine manufacturer, supplied the supplements and paid for one blood assay, and the senior author chairs AlzChem's scientific advisory board. The paper discloses this and says the sponsors had no role in collecting, analysing or interpreting the data.
Is creatine safe for people over 45?
In this trial side effects were infrequent, mild and similar on creatine and placebo, and nobody stopped because of the supplement. Blood creatinine rose slightly, as expected, and the kidney estimate stayed in the normal range. People with kidney disease should ask a clinician first.
Should older adults take creatine?
If you do resistance training, it is a reasonable addition: the evidence for extra strength and lean mass on top of training is consistent. If you do not train, start there. This trial does not show that creatine replaces exercise.
Keep reading
- Creatine and aging: the best-documented compound in longevity
Dose, forms, safety and what the trials show for strength and cognition.
- The sleep stack on trial: magnesium threonate, theanine and apigenin against placebo
Another popular supplement routine, read against its first controlled trial.
- How we grade evidence
Why one small trial moves a grade less than people expect.
More in Supplements
- The sleep stack on trial: magnesium threonate, theanine and apigenin against placebo
The Huberman-style sleep stack got its first placebo-controlled trial: in 103 healthy adults over two weeks it did no better than placebo on sleep.
- The best vitamins for longevity, ranked by human trial evidence
Vitamin D if your level is low, B12 if you are at risk, magnesium for most. Graded only on human randomised trials, including the two that showed harm.
- Best sleep aids, ranked by evidence.
Diphenhydramine stops working in about three nights. Melatonin is modest for insomnia, strong for jet lag. Every OTC sleep aid ranked on its human trials.
- Which OTC brands pharmacists recommend most — and where the evidence disagrees
Pharmacists name the same OTC brands every year. For immune support and joint health, the trials behind the two biggest sellers do not back how people use them.
- OTC cold and flu remedies, ranked by evidence
The FDA says the decongestant in most cold products does not work. Zinc works only above a dose most lozenges miss. Every OTC cold remedy ranked on its trials.
- PCC1 and the grape-seed longevity pill: what the study actually showed
PCC1 extended mouse lifespan by 9.4% — by injection, starting in old age. Here is the full study, the human data that exists, and what the capsules leave out.