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Open AccessReview

Risk of Adverse Outcomes in Females Taking Oral Creatine Monohydrate: A Systematic Review and Meta-Analysis

1
The Ritchie Centre, Hudson Institute of Medical Research, Melbourne 3168, Australia
2
Department of Obstetrics and Gynaecology, Monash University, Melbourne 3168, Australia
3
Monash Health, Monash Medical Centre, Melbourne 3168, Australia
4
Institute of Physical Activity and Nutrition, Deakin University, Melbourne 3125, Australia
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(6), 1780; https://doi.org/10.3390/nu12061780
Received: 20 April 2020 / Revised: 9 June 2020 / Accepted: 11 June 2020 / Published: 15 June 2020
(This article belongs to the Section Nutrition and Public Health)
Creatine Monohydrate (CrM) is a dietary supplement routinely used as an ergogenic aid for sport and training, and as a potential therapeutic aid to augment different disease processes. Despite its increased use in recent years, studies reporting potential adverse outcomes of CrM have been mostly derived from male or mixed sex populations. A systematic search was conducted, which included female participants on CrM, where adverse outcomes were reported, with meta-analysis performed where appropriate. Six hundred and fifty-six studies were identified where creatine supplementation was the primary intervention; fifty-eight were female only studies (9%). Twenty-nine studies monitored for adverse outcomes, with 951 participants. There were no deaths or serious adverse outcomes reported. There were no significant differences in total adverse events, (risk ratio (RR) 1.24 (95% CI 0.51, 2.98)), gastrointestinal events, (RR 1.09 (95% CI 0.53, 2.24)), or weight gain, (mean difference (MD) 1.24 kg pre-intervention, (95% CI −0.34, 2.82)) to 1.37 kg post-intervention (95% CI −0.50, 3.23)), in CrM supplemented females, when stratified by dosing regimen and subject to meta-analysis. No statistically significant difference was reported in measures of renal or hepatic function. In conclusion, mortality and serious adverse events are not associated with CrM supplementation in females. Nor does the use of creatine supplementation increase the risk of total adverse outcomes, weight gain or renal and hepatic complications in females. However, all future studies of creatine supplementation in females should consider surveillance and comprehensive reporting of adverse outcomes to better inform participants and health professionals involved in future trials. View Full-Text
Keywords: creatine monohydrate; supplementation; adverse outcomes; safety; human; female creatine monohydrate; supplementation; adverse outcomes; safety; human; female
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MDPI and ACS Style

de Guingand, D.L.; Palmer, K.R.; Snow, R.J.; Davies-Tuck, M.L.; Ellery, S.J. Risk of Adverse Outcomes in Females Taking Oral Creatine Monohydrate: A Systematic Review and Meta-Analysis. Nutrients 2020, 12, 1780.

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