Investigating the efficacy of ergothioneine to delay cognitive decline in mild cognitively impaired subjects: A pilot study.

Background: Dementia, particularly Alzheimer's disease, is a major healthcare challenge in ageing societies.

Objective: This study aimed to investigate the efficacy and safety of a dietary compound, ergothioneine, in delaying cognitive decline in older individuals.

Methods: Nineteen subjects aged 60 or above with mild cognitive impairment were recruited for this double-blinded, randomized, and placebo-controlled study (ClinicalTrials.