Creatine is a naturally occurring compound found in muscle cells. It helps your muscles produce energy during high-intensity exercise or heavy lifting¹². Here are some key points about creatine:

1. Function and Usage: Creatine is often used as a dietary supplement to help increase muscle mass, strength, and exercise performance. It is popular among athletes, bodybuilders, and those involved in sports requiring rapid bursts of energy².

2. Mechanism of Action: Creatine increases the phosphocreatine stores in muscles. This helps produce more ATP (adenosine triphosphate), which is the key energy carrier in all cells and is particularly important during short periods of high-intensity exercise³.

3. Forms of Creatine: The most common form used in supplements is creatine monohydrate. Other forms include creatine ethyl ester, creatine hydrochloride, and buffered creatine, although creatine monohydrate is the most researched and widely used⁴.

4. Benefits:

   • Increased muscle mass and strength: Creatine is well-known for enhancing muscle growth and improving performance in strength training⁵.
   • Enhanced athletic performance: It aids in improving performance in sports that require short bursts of energy such as sprinting and weightlifting⁶.
   • Cognitive benefits: Some research suggests creatine may improve cognitive functions, particularly in elderly individuals⁷.

5. Safety and Side Effects:

   • Short-term safety: Short-term creatine supplementation (less than 28 days) at recommended doses does not typically cause significant adverse effects⁸.
   • Long-term safety: Long-term studies indicate that creatine is generally safe for healthy individuals when taken in appropriate doses. However, potential side effects like weight gain and gastrointestinal issues (e.g., stomach upset, diarrhea) have been reported⁹¹⁰.
   • Renal and liver health: There is no strong evidence to suggest that creatine supplementation adversely affects renal or liver function in healthy individuals¹¹.

Creatine is one of the most researched nutritional supplements with a well-established safety profile and various benefits for muscle strength, exercise performance, and potentially cognitive health.

Footnotes

1. Potential side effects of oral creatine supplementation: a critical review - PubMed ↩

2. Creatine - Mayo Clinic ↩ ↩²

3. Creatine and creatinine metabolism - Physiol. Rev. ↩

4. International Society of Sports Nutrition position stand: Safety and efficacy of creatine supplementation - JISSN ↩

5. Effect of creatine and weight training on muscle creatine - Medicine and science in sports and exercise ↩

6. Benefits of Creatine Supplementation - Int J Environ Res Public Health ↩

7. Creatine supplementation and cognitive performance - PMC ↩

8. Few adverse effects of long-term creatine supplementation - PubMed ↩

9. Gastrointestinal distress after creatine supplementation - PubMed ↩

10. Common questions and misconceptions about creatine supplementation - PMC ↩

11. Effects of Creatine Supplementation on Renal Function - PubMed ↩