Why Creatine Is Studied Beyond Sport
Creatine participates in cellular energy buffering. That biological role motivates brain and aging research, but a plausible mechanism does not establish that everyone needs a supplement. Outcomes, populations and the accompanying treatment matter.
Cognition: Promising but Uneven Findings
A 2018 systematic review included six randomized trials with 281 healthy participants. It found possible benefits for short-term memory and intelligence or reasoning, while effects on attention, executive function and other domains were unclear or inconsistent [1].
The review did not establish a guaranteed improvement in everyday cognition or dementia prevention. Findings in vegetarians or under particular study conditions should not be assumed to apply to every healthy adult, and a sports maintenance dose is not automatically an established cognitive-treatment dose.
Older Adults: Evidence Includes Resistance Training
The 2014 Devries and Phillips meta-analysis, correctly identified by PMID 24576864, included 357 older adults undertaking resistance training. Adding creatine improved lean-mass gain and some strength and functional measures compared with training alone; other strength outcomes did not differ [3].
This supports evaluating creatine as an adjunct to resistance training. It does not show that a capsule replaces exercise, prevents falls or fractures, or treats all age-related muscle loss on its own. A different 2025 meta-analysis should not be attached to the 2014 paper’s title and DOI.
Depression: Adjunctive Research Is Not Self-Treatment
A 2012 trial randomized 52 women with major depression to escitalopram plus 5 g/day creatine or placebo for eight weeks. Symptoms improved more in the creatine group [2]. The study tested augmentation of an SSRI, not creatine as a replacement, and did not establish the same effect in men or all mood disorders.
People receiving psychiatric treatment should discuss any adjunct with their treating clinician. The findings are a research signal, not a reason to start, stop or replace an antidepressant independently.
Dose and Product Choice
Creatine monohydrate is the preparation most commonly studied. Sports regimens often use a loading period followed by a maintenance dose, or a lower daily dose without loading; NIH summarizes those exercise-specific protocols [4]. The need for loading depends on the purpose and timing, not a universal requirement.
The amount used for strength research should not be described as a proven treatment for every cognitive or mood outcome. Look for the exact preparation and regimen used in the relevant study rather than assuming a more expensive form is superior.
Safety and Practical Expectations
NIH describes creatine as generally well tolerated in healthy adults under studied conditions, with water-related weight gain and gastrointestinal symptoms among practical considerations [4]. This is not a guarantee of no kidney, liver or other problems in every person or indefinitely.
People with kidney disease, pregnancy, significant illness or relevant medications should review use with a clinician. Tell the clinician about creatine when interpreting kidney-function tests, because creatinine-based measures need context.
For healthy aging, adequate nutrition and resistance training remain central. The over-50 guide places supplementation within that broader assessment.