2.6. General Procedure of the Intervention
Participants in both groups were asked to take one tablet (6-MSITC or the placebo supplements) before going to bed every day for 12 weeks. Cognitive functions in all participants were assessed at the pre- and post-intervention period. Participants were also required to record their supplement intakes in the diary. After the intervention period, participants returned the remaining supplements and their diaries to the researchers. Then, we confirmed their adherence by checking the dairy and counting the remaining supplements.Previous studies using the 6-MSITC intervention set the intervention period at 8 weeks [