Received: 6 December 2020
Accepted: 5 October 2021
First Online: 13 November 2021
: The study was performed in accordance with the Declaration of Helsinki, was approved by the institutional review board of Chiyoda Paramedical Care Clinic, and registered with the UMIN (Registration number, UMIN000037370). A written informed consent was obtained from all participants.
: Not applicable.
: All authors are employees of House Wellness Foods Corp., which markets health food products.