Creatine for Climbers: What It Is and What's Known

Last updated: October 22, 2026

Short answer: Creatine for climbers is a maybe, not a proven edge. Creatine helps muscles make quick energy, and decades of research show it supports repeated short, hard efforts like sprints and lifting. Climbing-specific studies are tiny and have not shown a clear benefit, and creatine often adds water weight. Talk to your doctor before trying it.

That is the honest version of creatine for climbers. Lifters have a mountain of research behind them. Boulderers and sport climbers have a handful of small studies and a lot of gym talk. Here is what the evidence actually says, so you can have a better conversation with your doctor or dietitian.

What is creatine?

Creatine is a compound your body makes on its own and also gets from food.

• Your body makes it. According to the NIH Office of Dietary Supplements (ODS), the liver and kidneys make about 1 gram a day from the amino acids glycine, arginine, and methionine. Mayo Clinic adds the pancreas to that list.
• Food has it. Red meat and seafood are the main dietary sources. The ODS lists beef, pork, and salmon at roughly 2 grams per pound.
• Most of it lives in muscle. The International Society of Sports Nutrition (ISSN) position stand puts about 95 percent of the body's creatine in skeletal muscle, with small amounts in the brain and testes.
• Most supplements use one form. Creatine monohydrate is the most widely used and studied form. The ODS says other, usually pricier forms have not been proven better.

How does creatine work in muscle?

About two thirds of the creatine in muscle is stored as phosphocreatine, per the ISSN. Phosphocreatine helps your muscles rebuild ATP, the molecule that powers contraction, very quickly. Mayo Clinic describes it as the energy used during short bursts of activity.

The ODS lists four ways extra creatine might help: bigger phosphocreatine stores at the start of a hard effort, faster rebuilding of phosphocreatine afterward, less lactate buildup, and better glycogen storage. That fast system matters most in the first seconds of an all-out effort and in how quickly you recover between efforts.

What does research show for strength and power athletes?

This is where the evidence is strong.

• The ISSN position stand (Kreider and colleagues, 2017, Journal of the International Society of Sports Nutrition) calls creatine monohydrate "the most effective ergogenic nutritional supplement currently available to athletes with the intent of increasing high-intensity exercise capacity and lean body mass during training."
• The ODS says numerous clinical trials generally show a benefit for high-intensity, intermittent activity, and that creatine may increase strength, power, and work across repeated maximal efforts.
• The ODS also says creatine seems to be of little value for endurance sports, and that responses vary from person to person.
• Diet matters. Vegetarians start with lower muscle creatine, and both the ODS and Mayo Clinic note they may see larger effects.

What do climbing studies actually show?

Very little, and that is the most important part of this post.

1. A 2026 master's thesis is the clearest test we found. At the University of Akron, Elijah Washburn randomly assigned nine recreational climbers to creatine (4 people) or placebo (5 people) for four weeks. There was no statistically significant difference in relative finger strength on a hangboard test, blood lactate, or how climbers rated their own performance. The creatine group's body weight showed a large effect size, but that difference was not statistically significant either. The author calls for larger studies with more climbing-specific tests.
2. A planned trial in elite boulderers never ran. Bangor University registered a randomized, placebo-controlled study for the Great Britain Bouldering Team, with a simulated bouldering competition as one of its tests. ClinicalTrials.gov lists it as withdrawn because the manufacturer pulled the product from the market.
3. Nine people is not an answer. A study that small can miss a real effect, and it can't prove one either. What we have is an open question.

So for now, anything you hear about creatine and climbing is borrowed from other sports. Bouldering is short, hard efforts with rest between attempts, which looks like the kind of work where creatine has been studied. Long sport pitches are a different demand, and none of the climbing studies we could open tested creatine on them.

Will creatine make you heavier on the wall?

Probably a little, and climbers should care about that.

• The ODS says the one consistent side effect is weight gain, mainly from water retention and possibly more muscle protein. In some strength-training studies, people gained 1 to 2 kg in a month.
• The ISSN notes early loading studies saw short-term fluid retention of about 0.5 to 1.0 liters, in line with the weight gained.
• The Bangor trial's own summary notes that bouldering requires a high strength to body weight ratio.

If creatine makes you a bit stronger and a bit heavier, the net effect on the wall is unknown. Nobody has measured it in climbers yet.

Is creatine safe, and what about supplement quality?

For healthy adults, the major sources are reassuring.

• Mayo Clinic rates creatine "generally safe" and says it is likely safe for many people at recommended doses for up to five years. It also says studies in healthy people have not found kidney harm at recommended doses, while people with kidney disease should talk with their healthcare team first.
• The ISSN says creatine monohydrate supplementation is safe.
• The ODS lists anecdotal reports of nausea, diarrhea, muscle cramps, muscle stiffness, and heat intolerance. Mayo Clinic says research does not show a higher risk of cramps or muscle injury.

Quality is a separate issue. The U.S. Anti-Doping Agency (USADA) points out that the FDA does not evaluate supplements before they are sold. If you compete in a tested event, that matters: USADA notes creatine as an ingredient shows as "not prohibited" on Global DRO, but that does not cover a product that could be contaminated. USADA recommends athletes who choose supplements use third-party certified products and names NSF Certified for Sport. Mayo Clinic also advises picking a product that uses third-party testing.

How should a climber decide?

1. Start with training and food. The ODS frames supplements as an add-on to a solid diet, not a substitute.
2. Be clear on your goal. Short limit boulders and long endurance routes are different problems, and the research only speaks to the first kind, and not in climbers.
3. Factor in body weight. Decide how you feel about a possible gain of a kilo or two.
4. Check the product. If you compete, look for third-party certification.
5. Talk to your doctor or a registered dietitian. They can look at your health history, any kidney concerns, and whether creatine makes sense for you. This post is general information, not medical advice, and it does not give dosing advice.

FAQ

Does creatine help climbing performance?

Nobody knows yet. Creatine is well studied for repeated short, high-intensity efforts like sprints and lifting, but climbing-specific research is very thin. A small 2026 University of Akron thesis in nine recreational climbers found no statistically significant change in hangboard finger strength after four weeks.

Will creatine make me heavier on the wall?

It can. The NIH Office of Dietary Supplements lists weight gain from water retention as the main consistent side effect and notes a 1 to 2 kg increase in a month in some strength-training studies. For climbers, extra body weight is worth weighing against any possible benefit.

Is creatine safe?

Mayo Clinic rates creatine generally safe for many people at recommended doses for up to five years, and the ISSN position stand calls creatine monohydrate supplementation safe. People with kidney disease should talk with their healthcare team first. Ask your doctor before starting any supplement.

How much creatine should a climber take?

This post does not give dosing advice. Research protocols exist and are described by the NIH and the ISSN, but the right choice for you depends on your health, diet, and goals. Talk to your doctor or a registered dietitian.

Working on the skin side of grip too? Our guide to liquid chalk for climbing covers hand care at the gym and on the wall.

Sources

• International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine (Kreider et al., 2017, JISSN)
• Dietary Supplements for Exercise and Athletic Performance, NIH Office of Dietary Supplements
• Creatine, Mayo Clinic
• The Effect of Creatine Supplementation on Isometric Finger Strength in Recreational Rock Climbers (Washburn, University of Akron thesis, 2026)
• Can Creatine Supplementation Improve Performance in Rock Climbers? (Bangor University, ClinicalTrials.gov NCT06832423)
• Supplement Connect, U.S. Anti-Doping Agency

Cover photo: "Bouldering Hollow Mountain Cave 3" by Simon Li, via Wikimedia Commons, licensed CC BY 2.0, cropped.