Creatine — Benefits for Muscles, Brain & Aging
Creatine is best known for helping build muscle and improve strength, particularly when combined with resistance exercise. But growing research suggests its benefits may extend well beyond muscles.
Creatine also plays an important role in brain energy production, and researchers are investigating its potential to support memory, cognition, and healthy aging.
For older adults, creatine is particularly interesting because it combines well-established benefits for muscle strength with promising research on brain health. It's inexpensive, widely studied, and generally well tolerated in healthy adults.
What Does the Research Show?
Muscle Strength and Physical Performance
Numerous randomized trials show that creatine supplementation, particularly when combined with resistance training, can help older adults increase muscle strength and lean body mass. These benefits may help preserve mobility and independence as we age.
Memory and Cognitive Function
Creatine helps the brain maintain its energy supply. Some studies suggest supplementation may improve memory and certain aspects of cognitive performance, particularly in older adults, although results are mixed and larger trials are needed.
Brain Health and Alzheimer's Disease
Researchers are investigating whether creatine's role in cellular energy production could help protect brain function. The biological rationale is intriguing, but there is not yet convincing clinical evidence that creatine prevents or treats Alzheimer's disease.
How Much Creatine?
The most widely studied form is creatine monohydrate.
For muscle strength and physical performance, 3–5 grams daily is the usual recommendation, particularly when combined with resistance exercise.
For brain health and cognition, researchers are investigating higher doses, often 10–20 grams daily. The brain appears more difficult to saturate with creatine than muscles, and some studies suggest that higher doses or longer supplementation periods may be necessary.
In one small 2025 study involving 20 people with Alzheimer's disease, 20 grams daily for eight weeks increased brain creatine levels by approximately 11%, with encouraging improvements on some cognitive tests. However, this was an uncontrolled pilot study, not proof of clinical benefit.
The optimal dose for brain health remains uncertain. Older adults considering higher doses should discuss them with their healthcare professional, particularly if they have kidney disease or impaired kidney function.
Safety and Possible Side Effects
Creatine monohydrate is one of the most extensively studied supplements and has a strong safety record in healthy adults.
Possible side effects include mild digestive discomfort, temporary water-related weight gain, and occasional bloating. Dividing larger doses throughout the day may improve tolerability.
Creatine can raise blood creatinine levels without necessarily indicating kidney damage, which is important when interpreting laboratory tests.
People with kidney disease or reduced kidney function should consult their healthcare professional before taking creatine, particularly at higher doses.
Although long-term safety data are reassuring at conventional doses, the safety of taking 10–20 grams daily for years, especially in older adults, is less well established.
Learn More
Research
Research on creatine's effects on muscle strength, lean body mass, and physical performance in older adults.
Studies and systematic reviews examining creatine's possible effects on memory, cognition, and brain energy metabolism.
Emerging research investigating whether creatine supplementation may benefit people with Alzheimer's disease.
Videos
Dr. Nick Norwitz examines creatine's established benefits for muscle strength and physical performance, its possible effects on brain function, and common misconceptions about supplementation.
Dr. Boz [Annette Bosworth, MD] explores the growing interest in creatine supplementation for muscle strength, brain health, and healthy aging, including why some researchers advocate higher daily doses. The evidence for muscle benefits is stronger than for cognitive benefits.