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Completed

NCT Number: NCT06907537

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.

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Key information

Conditions

Healthy Japanese

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Nerima Medical Association Minami-machi Clinic, Nerima-ku, Tokyo, Japan

Loading trial locations.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Japanese
  • Men or women
  • Adults
  • Healthy individuals
  • Individuals whose Zc score of "sleepiness on rising" is relatively low at screening

Exclusion criteria

  • Individuals who are undergoing medical treatment or have a medical history of malignant tumor, heart failure, or myocardial infarction
  • Individuals who have a pacemaker or an implantable cardioverter defibrillator (ICD)
  • Individuals who are currently undergoing treatment of any of the following chronic diseases: cardiac arrhythmia, liver disorder, chronic kidney disease, cerebrovascular disorder, rheumatic disease, diabetes mellitus, dyslipidemia, hypertension, or any other chronic diseases
  • Individuals who are undergoing medical treatment or have a medical history of any of the following diseases: mental disorders (e.g., depression), sleep apnea syndrome, hypersomnia, narcolepsy, insomnia, or valvular heart disease
  • Individuals who have habits of consuming foods or using devices to improve sleep
  • Individuals who have irregular sleeping habits due to lifestyle such as night shifts
  • Individuals who fall under the following sleeping conditions: sleeping in the same room with two or more people, living with preschool-aged children, living with individuals who require nursing care, or having their sleep potentially disturbed by the influence of others
  • Individuals who have nocturia two times or more
  • Individuals who usually drink to excess (average of more than about 20 g/day as absolute alcohol intake) {500 mL: a medium bottle of beer or about 1.5 cans of canned chu-hi, 180 mL: 1 go of sake or about 1.5 glasses of wine, 90 mL: half-go with shochu, 60 mL: a glass of whiskey brandy (double)}
  • Individuals who are taking "Foods for Specified Health Uses" or "Foods with Functional Claims"
  • Individuals who are taking medications (including herbal medicines) or supplements
  • Individuals who are allergic to medicines or foods related to the test product, or have a gelatin allergy or sea squirt-induced asthma
  • Individuals who are pregnant, lactating, or planning to become pregnant during this study
  • Individuals who have been enrolled in other clinical studies within the last 28 days before the agreement to participate in this study or plan to participate in another study during this study
  • Individuals who are judged as ineligible to participate in this study by the physician

Treatment and study plan

Food containing plasmalogen

Dietary Supplement

Take four capsules per day in the morning.

Food without plasmalogen

Dietary Supplement

Take four capsules per day in the morning.

Primary outcomes

  1. The measured value of Zc score of "sleepiness on rising" in the OSA sleep inventory MA version (OSA-MA) after the 12-week intervention

    Time frame: After the 12-week intervention

    The OSA-MA is used to assess sleep quality. Individuals are asked to complete the questionnaire immediately after waking on the examination day and two days before the examination. The raw scores from each examination day will be converted to Zc scores, and the three-day mean, rounded to one decimal place, will be used as the measured value. "Sleepiness on rising" consists of four questions. Higher score indicates better outcome.

Secondary outcomes

  1. The measured value of Zc score of "sleepiness on rising" in the OSA-MA after the 6-week intervention

    Time frame: After the 6-week intervention

    The OSA-MA is used to assess sleep quality. Individuals are asked to complete the questionnaire immediately after waking on the examination day and two days before the examination. The raw scores from each examination day will be converted to Zc scores, and the three-day mean, rounded to one decimal place, will be used as the measured value. "Sleepiness on rising" consists of four questions. Higher score indicates better outcome.

  2. The measured values of Zc score of "initiation and maintenance of sleep," "frequent dreaming," "refreshing," and "sleep length" in the OSA-MA after the 6 and12-week intervention

    Time frame: After the 6 and12-week intervention

    The OSA-MA is used to assess sleep quality. Individuals are asked to complete the questionnaire immediately after waking on the examination day and two days before the examination. The raw scores from each examination day will be converted to Zc scores, and the three-day mean, rounded to one decimal place, will be used as the measured value. "Initiation and maintenance of sleep" consists of five questions, "frequent dreaming" consists of two questions, "refreshing" consists of three questions, and "sleep length" consists of two questions. Higher scores indicate better outcomes.

  3. The measured value of total score of the Athens Insomnia Scale (AIS) after the 6 and12-week intervention

    Time frame: After the 6 and12-week intervention

    The AIS is used to assess sleep-related issues over the past month. Individuals are asked to answer eight sleep-related questions by selecting one of four response options, indicating experiences they have had at least three times per week in the past month. Lower score indicates better outcome.

Sponsors and collaborators

Lead sponsor

Orthomedico Inc.

Other

Collaborators

  • AOBA KASEI CO., LTD.

Registry information

Official study title

A Study to Verify the Sleep-improving Effects of the Test Food Consumption: a Randomized, Placebo-controlled, Double-blind, Parallel-group Comparison Study

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Apr 2, 2025
Registry last updated
Dec 22, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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