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Exp Gerontol. 2018 Jul 15;108:166-173. doi: 10.1016/j.exger.2018.04.013. Epub 2018 Apr 25.

Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials.

Author information

1
251 Hellenic Airforce General Hospital, Athens, Greece; Aristotle University of Thessaloniki, Faculty of Health Sciences, Department of Medicine, Greece. Electronic address: kwstas-avge@hotmail.com.
2
251 Hellenic Airforce General Hospital, Athens, Greece; Faculty of Medicine, National and Kapodistrian University of Athens, Greece.
3
Aristotle University of Thessaloniki, Faculty of Health Sciences, Department of Medicine, Greece.
4
Laboratory of Neurosciences, National Institute on Aging, USA.

Abstract

BACKGROUND AND AIMS:

Creatine is a supplement used by sportsmen to increase athletic performance by improving energy supply to muscle tissues. It is also an essential brain compound and some hypothesize that it aids cognition by improving energy supply and neuroprotection. The aim of this systematic review is to investigate the effects of oral creatine administration on cognitive function in healthy individuals.

METHODS:

A search of multiple electronic databases was performed for the identification of randomized clinical trials (RCTs) examining the cognitive effects of oral creatine supplementation in healthy individuals.

RESULTS:

Six studies (281 individuals) met our inclusion criteria. Generally, there was evidence that short term memory and intelligence/reasoning may be improved by creatine administration. Regarding other cognitive domains, such as long-term memory, spatial memory, memory scanning, attention, executive function, response inhibition, word fluency, reaction time and mental fatigue, the results were conflicting. Performance on cognitive tasks stayed unchanged in young individuals. Vegetarians responded better than meat-eaters in memory tasks but for other cognitive domains no differences were observed.

CONCLUSIONS:

Oral creatine administration may improve short-term memory and intelligence/reasoning of healthy individuals but its effect on other cognitive domains remains unclear. Findings suggest potential benefit for aging and stressed individuals. Since creatine is safe, future studies should include larger sample sizes. It is imperative that creatine should be tested on patients with dementias or cognitive impairment.

KEYWORDS:

Cognitive function; Creatine; Healthy individuals; Memory

PMID:
29704637
PMCID:
PMC6093191
[Available on 2019-07-15]
DOI:
10.1016/j.exger.2018.04.013

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