Creatine - Separating Evidence from Myths

Creatine is one of the most researched supplements in nutrition science, yet it is still surrounded by confusion. It is often associated with gym culture or misunderstood as something risky to take daily. In reality, creatine is a naturally occurring compound found in foods like meat and produced by our own bodies. It plays a central role in cellular energy production.

A large body of peer-reviewed research has examined both its safety and effectiveness. Let’s unpack some of the most common myths and look at what the evidence actually tells us.

Myth 1: Creatine just causes water weight

Some people notice a small increase on the scale when they first begin creatine. Research shows this is largely due to water moving into muscle cells rather than general bloating or fluid retention. Longer-term studies do not show disproportionate increases in total body water relative to muscle mass.

In practical terms, early changes tend to reflect shifts inside muscle tissue rather than unwanted weight gain.

Myth 2: Creatine is basically a steroid

Creatine is not an anabolic steroid. Steroids are synthetic hormones that alter hormonal pathways in the body. Creatine supports the regeneration of ATP, the body’s primary energy currency. By improving the availability of energy during high-intensity efforts, it can enhance strength and training adaptations over time when paired with resistance exercise. The mechanisms are entirely different.

Myth 3: Creatine damages the kidneys

This is one of the most persistent concerns. Decades of research have not shown harmful effects on kidney function in healthy individuals taking recommended doses, typically around 3 to 5 grams per day. Blood creatinine levels can rise slightly with supplementation, but this reflects increased creatine turnover rather than kidney damage.

For healthy adults, the evidence does not support the idea that creatine harms kidney function when used appropriately.

Myth 4: Creatine increases fat mass

Another common worry is that creatine leads to fat gain. The evidence does not support this. Studies consistently show that creatine supplementation does not increase fat mass. When combined with resistance training, it is often associated with greater increases in lean mass without corresponding increases in body fat. Some research even notes reductions in fat mass alongside improvements in strength.

It is important to distinguish between gains in lean mass and actual fat gain. The current evidence does not show creatine causing increases in body fat.

Myth 5: Creatine is only for young athletes

Although creatine is popular among athletes, research suggests it may also be beneficial for older adults. Age-related muscle loss is a significant contributor to reduced strength, mobility and independence. Evidence indicates that creatine supplementation, particularly when combined with resistance training, can enhance gains in muscle mass, strength and functional performance in older adults.

The safety profile in older populations appears consistent with findings in younger adults when taken at recommended doses.

Myth 6: Creatine isn’t suitable for vegans

Creatine is found primarily in animal-based foods such as meat and fish. People following vegetarian or vegan diets typically consume little to no dietary creatine, and research shows they tend to have lower baseline muscle creatine stores compared with omnivores.

Supplementation with creatine monohydrate can increase muscle creatine stores in vegetarians and vegans to levels comparable to those seen in meat-eaters. Some research suggests individuals with lower baseline stores may experience equal or even greater relative increases with supplementation.

Importantly, creatine monohydrate itself is synthetically produced and is generally suitable for vegans. Most powdered forms are free from animal-derived ingredients. As always, it is wise to check product labels or confirm with manufacturers regarding capsule materials or additional additives.

For those following a plant-based diet, creatine supplementation may be a practical way to support muscle function and performance without compromising dietary principles.

Creatine beyond muscle

Creatine’s role in cellular energy production extends beyond muscle tissue to the brain. Because the brain has high energy demands, researchers are increasingly exploring whether creatine may support cognitive function in certain contexts, including ageing or periods of metabolic stress.

Some studies suggest possible benefits in areas such as memory and cognitive processing, particularly in individuals with lower creatine availability or during times when the brain is under greater strain.

For example, one small randomized trial in healthy young adults examined creatine supplementation during short-term sleep deprivation. Participants who received creatine before a night without sleep performed better on certain cognitive tasks, including measures of memory and vigilance, compared with placebo. The findings suggest that by supporting cellular energy availability, creatine may help maintain aspects of cognitive performance when the brain is under stress.

This does not mean creatine replaces sleep, nor does it position it as a universal cognitive enhancer. The broader body of evidence around memory and attention in healthy adults is still developing. Early findings are promising and genuinely exciting, but they are not yet definitive.

At this stage, the strongest and most consistent evidence for creatine remains in muscle strength, performance and functional capacity. The neurological and cognitive research is an emerging area that warrants further study, particularly in ageing populations and clinical contexts.

A balanced perspective

Creatine is not a magic solution, and it is not necessary for everyone. It is also not the risky supplement it is sometimes made out to be. It is a well-researched compound with a strong safety profile in healthy individuals when used appropriately.

As with any supplement, context matters. Training, nutrition, sleep and overall health foundations still come first. Creatine may be a helpful addition for some people, particularly those engaged in resistance training, following a plant-based diet, or looking to preserve muscle as they age.

If you are considering supplementation and want guidance tailored to your own health goals, we are here to help you make an informed, evidence-based decision that feels right for your body and your stage of life.

Kylie White

Nutritionist and Naturopath

References

1. Kreider RB, Kalman DS, Antonio J, et al. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr. 2021;18:13. PMCID: PMC7871530.

2. Rogerson D. Vegan diets: practical advice for athletes and exercisers. J Int Soc Sports Nutr. 2017;14:36. PMCID: PMC7246861.