---
title: "Creatine for Runners: Does It Help, and Should You Take It?"
description: "Creatine for runners: what the research shows from 5K to marathon, the water-weight tradeoff, who benefits, how to take it and who should skip it."
url: "https://wisdomrunning.com/creatine-for-runners/"
language: "en"
author: ["Alex Gorovenko"]
published: "2026-11-01T07:01:55.000-08:00"
modified: "2026-11-01T07:01:55.000-08:00"
tags: ["Training","Running Tips"]
---

# Creatine for Runners: Does It Help, and Should You Take It?

![Runner sprinting up a steep paved hill in a park in early-morning light](https://wisdomrunning.com/content/images/2026/10/creatine-for-runners-hill-sprint-v2.webp)

Creatine for runners can help a little with short, hard efforts and strength training, but it won't make your easy runs or long races faster. The research on endurance performance is consistent on that. The main tradeoff is some water weight, mostly if you start with large loading doses.

This guide explains what creatine does and doesn't do for your running, who is most likely to benefit and how to try it without a loading phase. It also covers side effects, who should check with a doctor first and why creatine can make a routine kidney blood test look worse than it is. The advice draws on meta-analyses and the few trials in runners. It also uses guidance from the NIH, the International Olympic Committee and a kidney-disease guideline.

## What creatine does in your body

Creatine is a compound your body makes from amino acids and also gets from meat and fish. About 95% of it is stored in your muscles, mostly as phosphocreatine, according to the [International Society of Sports Nutrition (ISSN) position stand](https://pmc.ncbi.nlm.nih.gov/articles/PMC5469049/). Phosphocreatine quickly regenerates ATP (adenosine triphosphate), the energy molecule that powers muscle contraction. That fast supply matters most during short, high-intensity efforts, such as a sprint, a steep hill or a heavy lift.

Your body uses up about 2 grams of creatine a day. If you eat meat, roughly half of that comes from food and your body makes the rest, according to a [review of creatine metabolism](https://pubmed.ncbi.nlm.nih.gov/26874700/). A typical diet leaves muscle stores 60% to 80% full. Supplements top them up, raising muscle creatine by about 20% to 40% on average, though the rise varies a lot from person to person.

That explains most of what follows. Creatine adds fuel for short, hard efforts. Easy runs, tempo runs and long runs rely mainly on your aerobic system, which burns carbohydrate and fat using oxygen, and creatine does little for that system.

## Does creatine help runners? What the research shows

Creatine offers no help for steady running. Research does show a small benefit for short, hard efforts and strength training. Most trials were small and studied young trained men. Those men were often cyclists, rowers or team-sport athletes rather than distance runners.

| Claim | What the research shows | What it means for you |
| --- | --- | --- |
| Creatine makes you faster from the 5K to the marathon | Not shown. A [2023 meta-analysis of 13 trials](https://pubmed.ncbi.nlm.nih.gov/36877404/) in trained athletes found no effect on endurance performance. We found no placebo-controlled trial of creatine monohydrate that measured 5K, 10K, half marathon or marathon times. | Don't take it to race faster over distance. |
| Creatine raises VO2max | No. In a [2023 meta-analysis of 19 trials](https://pubmed.ncbi.nlm.nih.gov/34859731/), VO2max rose in both groups, but it rose less with creatine than with a placebo. | Your aerobic fitness still comes from running. |
| Creatine helps short, hard efforts | Yes, modestly. Across [14 trials of repeated sprints](https://pubmed.ncbi.nlm.nih.gov/36041731/) lasting 10 seconds or less, creatine raised average power. Single-sprint results are mixed. | Strides, hill sprints and short intervals are where you might notice it. |
| Creatine builds strength when you lift | Yes, with small to moderate gains. A [meta-analysis of 60 trials](https://pubmed.ncbi.nlm.nih.gov/25946994/) found bigger lower-body strength gains with creatine. With resistance training, creatine added about 1.1 kg (2.4 pounds) of extra lean mass in a [2022 meta-analysis](https://pubmed.ncbi.nlm.nih.gov/35986981/). | Worth considering if you lift regularly. |
| Creatine speeds recovery | Mixed. A [2021 meta-analysis of 13 trials](https://pubmed.ncbi.nlm.nih.gov/33631721/) found no faster return of strength and no less soreness. | Don't count on fresher legs. |
| Creatine stores more fuel for long runs | Unproven. Creatine with lots of carbohydrate can raise muscle glycogen, but the [one trial that tested performance](https://pubmed.ncbi.nlm.nih.gov/28806275/), in cyclists, found no faster 120-km time trial. | It's not a shortcut to better long-run fueling. |

### Steady running and VO2max

The 2023 endurance meta-analysis pooled 13 placebo-controlled trials in trained athletes, and creatine made no difference. An [older meta-analysis of 100 studies](https://pubmed.ncbi.nlm.nih.gov/12945830/) reached the same conclusion for running and swimming specifically. The VO2max meta-analysis points the same way: VO2max, a key measure of aerobic fitness, rose less with creatine than with a placebo.

Few creatine trials have timed runners over longer distances. A small 1993 study of 18 well-trained men, summarized in a [2023 review](https://pmc.ncbi.nlm.nih.gov/articles/PMC10132248/), compared creatine with a placebo. The creatine group took 20 grams a day for six days, gained about 0.9 kg (2 pounds) and then ran a 6-km (3.7-mile) cross-country course more slowly. The researchers blamed the extra weight.

That same review, written by creatine researchers, concludes that creatine is "unlikely to have a significant benefit" during steady, moderate endurance exercise. It also notes that the extra weight may cancel out any benefit in weight-bearing sports, and running is one.

### Hills, intervals and finishing kicks

Creatine's better case for endurance athletes is the hard moments inside a race or workout: a surge, a climb, a sprint finish. The same review says creatine "appears to be more effective" for these end spurts. However, its examples come from rowing, cycling and swimming, and the authors call for running studies.

The running data are thin. In a [treadmill study of 50 moderately trained men and women](https://pubmed.ncbi.nlm.nih.gov/20543729/), men on creatine could cover about 23% more distance than men on a placebo at paces faster than their critical speed, while women showed no difference. A [review of the concept](https://pmc.ncbi.nlm.nih.gov/articles/PMC5070974/) describes critical speed as the boundary above which your body can't settle into a steady state. Above it, fatigue builds until you have to slow down. Studies of trained sprinters found no faster [40-meter](https://pubmed.ncbi.nlm.nih.gov/12930168/) or [150-meter](https://pubmed.ncbi.nlm.nih.gov/9542771/) times.

If your week includes strides, hill repeats or short intervals, creatine may help you hold power on the later reps. There's no evidence yet that this turns into a faster 5K.

### Strength training

Creatine's best-supported use is making strength training a little more productive. In the strength meta-analyses above, people who lifted while taking creatine gained more strength and lean mass than people who lifted on a placebo. In a [review of 22 trials](https://pmc.ncbi.nlm.nih.gov/articles/PMC5679696/), adults with an average age between 57 and 70 who lifted two or three times a week gained about 1.4 kg (3 pounds) more lean tissue with creatine.

Without lifting, the 2022 meta-analysis found no lean-mass gain. Creatine works through the training, so for strength and muscle it is only worth considering if you already do strength work, like the [glute and hip exercises](https://wisdomrunning.com/runners-butt/) many runners use. Strength training can make running more economical, but the [2023 review](https://pmc.ncbi.nlm.nih.gov/articles/PMC10132248/) notes that it's still unclear whether creatine adds to that benefit in runners.

![Runner holding a kettlebell at his chest at the bottom of a goblet squat in a home garage gym](https://wisdomrunning.com/content/images/2026/10/creatine-for-runners-goblet-squat-v2.webp)

*Illustrative scene: creatine adds a little strength and muscle only when you lift, as in this goblet squat.*

### Recovery after hard runs

The most runner-specific trial looked at recovery. Runners with marathon best times of 2.5 to 3 hours took 20 grams of creatine a day for five days before a 30-km (18.6-mile) run. Their blood markers of muscle damage and inflammation rose less the next day than those of a placebo group, according to the [2004 study](https://pubmed.ncbi.nlm.nih.gov/15306159/). The study didn't measure soreness or compare race times.

Broader research doesn't show a recovery benefit you would feel. The 2021 meta-analysis found no effect on soreness or strength. A [2022 meta-analysis](https://pmc.ncbi.nlm.nih.gov/articles/PMC9213373/) found lower damage markers after a single hard session but higher ones after weeks of training.

## Creatine and weight gain

Weight gain is the one cost that matters for most runners. A loading phase can add 1 to 2 kg (about 2 to 4 pounds), mostly from water retention in the muscles, according to the [International Olympic Committee's supplement consensus](https://pmc.ncbi.nlm.nih.gov/articles/PMC5867441/). It says this "may be detrimental for endurance performance". In [placebo-controlled sprint trials](https://pubmed.ncbi.nlm.nih.gov/36041731/), the average gain was smaller, about 0.8 kg (1.7 pounds).

Over months, the picture changes. A [review of common creatine questions](https://pmc.ncbi.nlm.nih.gov/articles/PMC7871530/) concluded that over longer periods, creatine doesn't raise body water relative to muscle mass. If you lift, some of the later gain may be muscle. In a [six-week trial](https://pubmed.ncbi.nlm.nih.gov/20591625/), a low daily dose of about 2.3 grams with no loading caused no weight gain, though that study didn't measure creatine in the muscle.

Whether 2 pounds slows you down isn't settled. The researchers in the 1993 study thought it did. In a [study of 15 endurance runners](https://pmc.ncbi.nlm.nih.gov/articles/PMC3283512/), a similar gain from creatine combined with glycerol didn't change how much oxygen they used at an easy pace, but that study had no placebo group.

Skip the loading phase. Start well away from a goal race and don't be surprised if the scale moves a little. A small jump in the first weeks is mostly water, not fat, and it's not a reason to cut back on food. Our guide to [why the scale rises when you run](https://wisdomrunning.com/gaining-weight-running/) explains why one weigh-in can't tell you which is which.

## Creatine for runners: who should try it and who can skip it

Creatine is optional. It won't replace consistent running, enough food, sleep or strength work. Use the table to see whether it's worth trying for your kind of training.

| Your running | Likely value | Why | What to do |
| --- | --- | --- | --- |
| Mostly easy runs for fitness, no strength work | Low | The benefits show up in hard efforts and lifting, not steady running | Skip it |
| 5K or 10K training with strides, hills and intervals | Possible, small | Repeated-sprint power improves in short trials, but we found no controlled monohydrate trial that timed a 5K | Try it during a training block, not right before a goal race |
| Half marathon or marathon training | Low for race times | No benefit for steady endurance, and any extra weight comes along for every mile | Skip it during the build; consider it in an off-season strength block |
| You lift at least twice a week | Moderate | Creatine plus lifting adds a little more strength and lean mass | Reasonable to try |
| You're over 50 and lift | Moderate | In trials of adults averaging 57 to 70, creatine added lean mass and strength to lifting | Keep lifting; creatine does little on its own |
| You're vegetarian or vegan | Possibly higher | Lower starting stores mean a bigger rise in muscle creatine, though performance results are mixed | Decide using the rows above, ideally pairing it with lifting |
| You're a woman | Less certain | Few trials include women, and pooled gains were smaller | Decide based on your training and goals, using the rows above |
| You're under 18 | No | Professional groups cited by the NIH see no justification for performance supplements in young athletes | Skip it |

The vegetarian row comes from an [eight-week lifting trial](https://pubmed.ncbi.nlm.nih.gov/14600563/) in which vegetarians started with lower stores and gained more muscle creatine and lean tissue than meat-eaters. For women, the 2022 lean-mass [meta-analysis](https://pubmed.ncbi.nlm.nih.gov/35986981/) found a small, non-significant gain, but few women have been studied. In a [2026 review of 7 trials](https://pmc.ncbi.nlm.nih.gov/articles/PMC13182165/), postmenopausal women who lifted and took at least 5 grams a day gained a little lean mass and leg strength. Creatine didn't improve bone density in [two-year trials](https://pmc.ncbi.nlm.nih.gov/articles/PMC10487398/).

## How runners can take creatine

A trial doesn't need to be complicated. If you decide to try creatine, use one plain product with a modest daily dose and a fair trial period.

### Pick plain creatine monohydrate

Monohydrate is the form used in most of the research above. Newer forms, such as creatine hydrochloride or buffered creatine, "have not been proven to have superior ability", according to the [NIH Office of Dietary Supplements](https://ods.od.nih.gov/factsheets/ExerciseAndAthleticPerformance-HealthProfessional/). Unflavored powder mixed into water, juice or a smoothie works fine. Mix each dose fresh rather than storing it premixed, because creatine breaks down in liquid over a few days.

The FDA [does not approve supplements](https://www.fda.gov/consumers/consumer-updates/fda-101-dietary-supplements) for safety or effectiveness before they're sold. A third-party seal, such as NSF Certified for Sport or Informed Sport, adds independent testing for banned substances, and NSF also checks that the contents match the label. The [US Anti-Doping Agency](https://www.usada.org/spirit-of-sport/creatine-supplements/) recommends certified products for tested athletes. Be wary of gummies: in [company-run lab tests](https://www.naturalproductsinsider.com/supplement-regulations/now-tests-creatine-gummies-finding-almost-half-to-be-severely-understrength-) that were not peer-reviewed, several gummy brands contained little or no creatine.

### How much to take

Take 3 to 5 grams a day, often called the maintenance dose. At that dose, your muscle stores fill in about four weeks. In a [classic biopsy study](https://pubmed.ncbi.nlm.nih.gov/8828669/), 3 grams a day for 28 days raised muscle creatine by 20%, the same as a six-day loading phase.

A loading phase is the faster route: about 0.3 grams per kilogram of body weight a day, usually 20 grams split into four 5-gram doses, for five to seven days. For a 154-pound (70 kg) runner, that's 0.3 × 70 = 21 grams a day. Loading isn't required, and the [ISSN's guide to common questions](https://pmc.ncbi.nlm.nih.gov/articles/PMC7871530/) suggests skipping it if you want to avoid weight gain. For most runners, skipping it is the better choice, since that also avoids the large doses linked to stomach upset.

### When to take it

Timing matters less than taking it every day. Studies comparing doses before and after workouts are small and found no clear difference, according to a [2025 ISSN review](https://pmc.ncbi.nlm.nih.gov/articles/PMC11703406/). Taking it with a meal that includes carbohydrate and protein can help your muscles absorb more of it, so breakfast or a post-run meal works well.

You probably don't need to give up coffee. One small 1996 study found that high daily caffeine intake blunted creatine's effect, but later studies are mixed. The 2025 review concluded that staying below about 5 milligrams of caffeine per kilogram of body weight a day (350 milligrams for a 154-pound runner) is unlikely to interfere.

### When to start in your training year

Start during base training or a strength block, at least four weeks before you'd want any benefit. Avoid starting in the final weeks before a goal race, when even a small jump on the scale could unsettle you.

Stopping right before a race won't undo much, because muscle creatine takes about four to six weeks to return to normal after you stop, according to the ISSN position stand. The position stand also found no evidence that stores drop below where they started.

### Give it four to six weeks, then decide

Choose a few things to track before you start:

-   Weigh yourself once a week on the same scale at the same time of day.
-   How the last reps of an interval or hill session feel at the same paces as before
-   Your strength numbers if you lift, such as the weight or reps on a squat or step-up
-   Your stomach, especially on run days

If you see no benefit after four to six weeks, it's fine to stop. Some people barely raise their muscle creatine, especially if their stores were already high, according to [small biopsy studies](https://pubmed.ncbi.nlm.nih.gov/8203511/).

## Is creatine safe? Side effects and myths

For healthy adults taking 3 to 5 grams a day, creatine has a strong safety record. The [Mayo Clinic](https://www.mayoclinic.org/drugs-supplements-creatine/art-20347591) says it is likely safe for up to five years. Trials in healthy people have run up to two years. In a [trial of people with Parkinson's disease](https://pmc.ncbi.nlm.nih.gov/articles/PMC4349346/) that followed participants for a median of four years, side effects were no more common on 10 grams a day than on a placebo. Weight gain is the only side effect reported consistently.

| Concern | What the evidence shows |
| --- | --- |
| Stomach upset | Usually tied to big single doses. In a [28-day trial of 59 soccer players](https://pubmed.ncbi.nlm.nih.gov/18373286/), diarrhea was about half as common on two 5-gram doses as on one 10-gram dose. Stay at 3 to 5 grams a day, or split larger amounts. |
| Kidney damage | No harm shown in healthy people. A [2026 meta-analysis of 20 trials](https://pubmed.ncbi.nlm.nih.gov/42035842/) found no significant change in estimated kidney function. |
| Liver damage | Not shown. Liver enzymes didn't change meaningfully over 21 months in football players, and liver-related side effects were no more common than with a placebo in a two-year trial of postmenopausal women. |
| A "bad" kidney blood test | Creatine can raise creatinine, the blood marker doctors use to estimate kidney function, so your result can look worse even when your kidneys are fine. A [2026 meta-analysis](https://pubmed.ncbi.nlm.nih.gov/42507286/) found that directly measured kidney filtration didn't change. Tell your doctor you take creatine before a blood test. |
| Dehydration, cramps or heat illness | Not supported. A [review of 10 trials](https://pmc.ncbi.nlm.nih.gov/articles/PMC2657025/) found no sign that creatine hurts heat tolerance or fluid balance. |
| Hair loss | Not shown. One [2009 study of 20 rugby players](https://pubmed.ncbi.nlm.nih.gov/19741313/) found a rise in DHT, a hormone involved in male-pattern baldness, but didn't measure hair. A [12-week trial](https://pmc.ncbi.nlm.nih.gov/articles/PMC12020143/) found no change in DHT or hair. |
| "It's a steroid" or banned | Neither. Creatine has a [different chemical structure](https://pmc.ncbi.nlm.nih.gov/articles/PMC7871530/) from anabolic steroids. It isn't on the World Anti-Doping Agency's [2026 Prohibited List](https://www.wada-ama.org/sites/default/files/2025-09/2026list_en_final_clean_september_2025.pdf), and [USADA confirms](https://www.usada.org/spirit-of-sport/athletes-need-know-creatine/) it isn't prohibited. |

### A runner-specific caution: lower-leg pressure

Small studies found that creatine raised pressure in the front compartment of the lower leg, the muscle area beside the shin. In a [study of 14 men](https://pubmed.ncbi.nlm.nih.gov/11403120/), pressure after 20 minutes of treadmill running was well above placebo levels after both six days and about five weeks of creatine. In a [later study](https://pmc.ncbi.nlm.nih.gov/articles/PMC1421498/), the increases were temporary and caused no symptoms.

These were short studies that measured pressure, not injuries. Still, ask your doctor before trying creatine if you've had chronic exertional compartment syndrome. If you notice new lower-leg pain or tightness during runs, stop taking creatine. See a doctor if it doesn't ease with rest.

## Who should check with a doctor first

If any of these apply, talk with your doctor or pharmacist before taking creatine:

-   **You have kidney disease** or have been told that your kidney function is reduced. Research in kidney disease is limited. Talking with your healthcare team first is what the Mayo Clinic advises.
-   **You take prescription medicine regularly,** including drugs for blood pressure such as lisinopril or hydrochlorothiazide. Ask whoever prescribes these drugs because we found no study that tested them with creatine.
-   **You have diabetes or high blood pressure.** Neither rules out creatine, but both raise the risk of kidney disease, according to the [KDIGO kidney guideline](https://kdigo.org/wp-content/uploads/2024/03/KDIGO-2024-CKD-Guideline.pdf). Ask your doctor whether your kidney function has been checked recently.
-   **You're pregnant.** There are no human trials in pregnancy.
-   **You're breastfeeding.** The NIH's [LactMed database](https://www.ncbi.nlm.nih.gov/books/NBK501853/) says it is "probably best to avoid creatine supplementation unless it is prescribed by a healthcare professional."
-   **You're under 18.** Sports nutrition and medicine groups cited by the [NIH](https://ods.od.nih.gov/factsheets/ExerciseAndAthleticPerformance-HealthProfessional/) see no justification for young athletes to use performance supplements.

## Your next step

You can skip creatine if you mostly run easy miles and don't lift. You'll get more from consistent training and good fueling.

If you run intervals or hills, or lift at least twice a week, a trial is reasonable. If you're over 50 or don't eat meat, pairing it with lifting gives it the best chance to help. Skip the loading phase. Take 3 to 5 grams of plain, third-party-tested creatine monohydrate a day with a meal and start during base training or a strength block. Review your weekly weigh-ins and hard sessions along with your lifts and stomach after four to six weeks. Then decide whether to keep going. Talk with your doctor first if any of the health conditions above apply to you.

## Frequently asked questions

### Does creatine make you slower?

It can, mainly by adding weight. Creatine doesn't improve your aerobic fitness, and a loading phase can add 1 to 2 kg (about 2 to 4 pounds), mostly water. In a [small 1993 study](https://pmc.ncbi.nlm.nih.gov/articles/PMC10132248/), trained men ran a 6-km cross-country course more slowly after loading. Taking 3 to 5 grams a day without loading keeps any gain smaller.

### Will creatine improve my 5K time?

There's no good evidence that it will. We found no placebo-controlled trial of creatine monohydrate that measured 5K times, and a [small study of a different creatine product](https://pubmed.ncbi.nlm.nih.gov/16287365/) found no change in cross-country runners' 5,000-meter times. Creatine may help you hold power on the later reps of strides, hill repeats or short intervals, but there's no evidence yet that this leads to a faster 5K.

### Should runners take creatine before or after a run?

Both options are fine. Small studies comparing doses before and after workouts found no clear difference, and taking creatine every day matters more than timing. Taking it with a meal can help your muscles absorb more of it when that meal includes carbohydrate and protein.

### Can I take creatine if I take blood pressure medication?

First ask whoever prescribes your medication. We found no study testing creatine with blood pressure drugs such as lisinopril or hydrochlorothiazide. There's no evidence either way. Creatine can also raise creatinine, a blood marker used to estimate kidney function. Tell your doctor you take it before any blood test.

### Do runners need a creatine loading phase?

No. In a [biopsy study](https://pubmed.ncbi.nlm.nih.gov/8828669/), taking 3 grams a day for 28 days raised muscle creatine by the same amount as a six-day loading phase. Skipping the loading phase also spares you the large doses linked to stomach upset and makes a quick jump on the scale less likely.

### Is creatine good for marathon runners?

Not for race performance. A [meta-analysis of 13 trials](https://pubmed.ncbi.nlm.nih.gov/36877404/) in trained athletes found no effect on endurance performance, and any extra weight comes with you for all 26.2 miles. If you lift during an off-season or base phase, creatine may add a little to those strength gains.

### How long does creatine take to work?

A daily dose of 3 to 5 grams fills muscle stores in about four weeks. A loading phase gets there in five to seven days. Use it steadily for four to six weeks before deciding whether it's helping.