Creatine is one of the most studied and used sports supplements in the world of fitness and athletic performance. For decades, it has been the subject of debate, urban myths, and confusion that have led many people to doubt its safety and effectiveness. In recent years, scientific research has provided solid evidence of its true effects on the body, debunking false beliefs and confirming benefits that go beyond simple muscle growth. This supplement, which the body produces naturally and is also found in foods like red meat and fish, has proven to be safe and effective when used correctly, although misunderstandings about how it works and its consequences persist. What should you know about creatine? Creatine is one of the most popular supplements among athletes and active people, but also one of the most misunderstood. Amid alarmist claims and exaggerated promises, separating fact from fiction has become essential for those considering incorporating it into their nutritional regimen. For years, creatine monohydrate has been the subject of controversy and misinformation. From accusations of alleged kidney damage to miraculous promises of immediate physical transformation, this compound has been surrounded by myths that have confused both beginners and experienced users. Science, however, has advanced considerably in the study of this supplement, providing concrete data that allows for informed decisions. Creatine is an organic compound that the human body produces naturally from three amino acids: arginine, glycine, and methionine. Approximately 95% of the body's creatine is stored in skeletal muscles, where it plays a crucial role in energy production during high-intensity, short-duration exercise. The body produces about 1 gram of creatine per day.Creatine is also obtained through food, primarily from red meat and fish. Supplementation aims to saturate muscle creatine stores, allowing for improved physical performance.

Myths and Truths about Creatine

Myth 1: Creatine damages the kidneys and liver:

FALSE. This is perhaps the most persistent myth about creatine. Numerous long-term scientific studies have shown that creatine monohydrate supplementation at recommended doses does not cause kidney or liver damage in healthy individuals. A study published in the Journal of the International Society of Sports Nutrition reviewed decades of research and concluded that there is no evidence of adverse effects on these organs in individuals without pre-existing conditions.

It is important to clarify that people with diagnosed kidney disease should consult their doctor before consuming creatine, as with any supplement.

Blood tests may show a slight increase in creatinine levels, a marker used to assess kidney function, but this does not indicate damage; it simply means there is more creatine in the body.

Myth 2: Creatine is a steroid or dangerous substance:

FALSE. Creatine is not an anabolic steroid or a banned substance. It is a naturally occurring compound produced by the body and found in everyday foods. It has no hormonal effects and is not banned by any major sports organization. The confusion likely stems from its popularity in the bodybuilding world and because it produces visible results in physical performance, but its mechanism of action is completely different from that of steroids.

Fact 1: Creatine improves performance in high-intensity exercise:

TRUE. The scientific evidence is compelling: creatine monohydrate significantly improves performance in high-intensity, short-duration exercises such as weightlifting, sprints, and interval training. It works by increasing phosphocreatine stores in the muscles, allowing for faster regeneration of ATP, the primary source of cellular energy. This translates into the ability to perform more repetitions, lift heavier weights, or maintain intensity for longer periods.

Truth 2: Creatine causes water retention (but not fat):

TRUE. Creatine does indeed cause water retention, but this occurs within the muscle cells, not under the skin like the retention that causes bloating. This effect is part of its mechanism of action and contributes to increased muscle mass. The initial weight gain experienced by users, typically between 1 and 3 kilograms in the first few weeks,This is primarily due to intracellular water retention. It's important to note that this is not body fat and can give muscles a fuller appearance.

Myth 3: You need to do a mandatory loading phase:

FALSE. Although a loading phase (consuming 20 grams daily divided into 4 doses for 5-7 days) saturates muscle creatine stores more quickly, it is not mandatory. Taking a maintenance dose of 3-5 grams daily from the start will produce the same results in approximately 3-4 weeks. The choice between doing a loading phase or not depends on personal preference and whether you want to experience the benefits more quickly or more gradually.

Truth 3: Not everyone responds the same way to creatine:

TRUE. There is individual variability in response to creatine supplementation. Approximately 20-30% of people are considered “non-responders,” generally because they already have naturally high levels of muscle creatine, often due to a high consumption of red meat in their diet. This does not mean that creatine is ineffective, but rather that some individuals are already close to muscle saturation and will experience less noticeable improvements.

Myth 4: Women shouldn't take creatine because it will make them “bulky”:

FALSE. This myth is based on misunderstandings about how muscle development and creatine work. Women have significantly lower testosterone levels than men, making the development of bulky muscle mass much more difficult. Creatine simply enhances performance and recovery, benefiting men and women equally. In fact, research shows that women can especially benefit from creatine supplementation, including potential cognitive and bone health benefits.

Fact 4: Creatine has benefits beyond muscle:

TRUE. Recent research has found that creatine can have benefits for brain health, including improvements in memory and cognitive function, especially in situations of sleep deprivation or mental stress. Its potential in neurodegenerative diseases and its role in bone health are also being studied. The brain uses creatine to produce energy, and supplementation can increase the brain's stores of this compound.

Myth 5: You must cycle creatine or "rest" periodically:

FALSE. There is no scientific evidence to suggest that it is necessary to cycle creatine or take periodic breaks. The body does not develop dependence on or tolerance to creatine. The body's natural production of creatine may decrease slightly during supplementation,but it normalizes quickly upon discontinuation. Taking creatine continuously is safe and keeps muscle stores saturated, maximizing the benefits.

Practical Recommendations

For those who decide to incorporate creatine monohydrate into their regimen, experts recommend starting with 3-5 grams daily, taken at any time of day with plenty of water. Creatine monohydrate is the most studied and economical form, and there is no convincing evidence that other, more expensive forms are superior. Consistency is key: the benefits are maximized when taken daily, regardless of whether you train that day or not.

It is essential to purchase products from reputable brands that conduct third-party testing to ensure purity and quality, as the supplement market is poorly regulated.

Staying well hydrated is important, not because creatine causes dehydration (another myth), but because proper hydration optimizes overall muscle function. As with any supplement, creatine is not a magic bullet and does not replace a balanced diet, consistent training, and adequate rest. It is simply a tool that can help optimize performance and results when these fundamentals are already in place. You may also be interested in: