Creatine monohydrate pilot in Alzheimer's: Feasibility, brain creatine, and cognition.

BACKGROUND

Preclinical studies suggest that creatine monohydrate (CrM) improves cognition and Alzheimer's disease (AD) biomarkers. However, there is currently no clinical evidence demonstrating the effects of CrM in patients with AD.

METHODS

In this single-arm pilot trial, we investigated the feasibility of 20 g/day CrM for 8 weeks in 20 patients with AD. We measured compliance throughout; serum creatine at baseline, 4 weeks, and 8 weeks; and brain total creatine (tCr) and cognition (National Institutes of Health [NIH] Toolbox, Mini-Mental State Examination [MMSE]) at baseline and 8 weeks.

RESULTS

Nineteen participants achieved the target of ≥80% compliance with the CrM intervention. Serum Cr was elevated at 4 and 8 weeks (p < .001) and brain tCr increased by 11% (p < .001). Cognition improved on global (p = .02) and fluid (p = .004) composites, List Sorting (p = .001), Oral Reading (p < .001), and Flanker (p = .05) tests.

DISCUSSION: Our data suggest that CrM supplementation is feasible in AD and provides preliminary evidence for future efficacy and mechanism studies.

TRIAL REGISTRATION: ClinicalTrials.gov, NCT05383833, registered on May 20, 2022.

HIGHLIGHTS: Creatine monohydrate supplementation was feasible in patients with Alzheimer's disease.Creatine monohydrate was associated with increased brain total creatine.Creatine monohydrate was associated with improvements in cognition.Efficacy of creatine monohydrate in Alzheimer's disease should be studied further.