None (Healthy adults)
Conditions
Interventions
After completion of a mild mental stress task, participants consume 100 mL of dashi at 60 degrees Celsius as a single oral intake, and outcome measures are assessed repeatedly before and after intake.
Sponsors
Toyo University
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: - Healthy adults (male and female) aged 18 to 45 years. - Individuals who have received a full explanation of the study objectives and procedures and have provided written informed consent. - Individuals in good physical condition on the day of measurement and able to complete the study procedures without difficulty. - Individuals who are able to normally consume dashi ingredients (seafood, kelp, and mushrooms).
Exclusion criteria
Exclusion criteria: - Individuals with a history of or currently receiving treatment for cardiovascular, metabolic, neurological, or endocrine disorders. - Individuals who regularly use medications that may affect autonomic nervous system function (e.g., antihypertensive agents, anxiolytics, hypnotics/sleeping medications). - Current smokers or individuals with a habitual pattern of excessive alcohol consumption. - Individuals with taste or olfactory disorders, or with food allergies to seafood, kelp, umami seasonings, or related ingredients. - Individuals who are pregnant or breastfeeding. - Individuals reporting significant physical discomfort or poor health condition on the day of the study. - Individuals judged by the principal investigator to be unsuitable for participation in the study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Salivary alpha-amylase measured at multiple time points before and after dashi intake | — |
Secondary
| Measure | Time frame |
|---|---|
| Heart rate variability (HRV), peripheral blood flow, blood pressure and pulse rate, and subjective measures using a visual analog scale (VAS) for calmness, anxiety, sleepiness, and fatigue. | — |
Countries
Japan
Contacts
Public ContactNaho Serizawa
Toyo University Faculty of Health and Sports Science
Outcome results
None listed