A Study to Verify the Sleep-improving Effects of the Test Food Consumption

The goal of this clinical trial is to test in Japanese adults who feel sleepy when they wake up. The question it aims to answer are: •Does taking plasmalogens reduce sleepiness upon waking? Participants will be given the following tasks: * Take 4 capsules daily containing plasmalogens for 12 weeks. * Answer the questionnaire on sleepiness1 when they wake up. * Answer the questionnaire on daytime sleepiness2. Researchers will compare plasmalogens and placebo groups to see if plasmalogens reduce sleepiness upon waking.