None (Healthy adults)
Conditions
Interventions
Drink the test tea once a day for 3 weeks followed by washout-period, after which drink the placebo tea once a day for 3 weeks.
Drink the placebo tea once a day for 3 weeks followed by washout
Sponsors
Tsurumi University
Eligibility
Sex/Gender
Female
Inclusion criteria
Inclusion criteria: 1)Japanese Females aged from 18 to 29, when giving the informed consent. (2)Subjects who never smoke tobacco.
Exclusion criteria
Exclusion criteria: 1. Subjects who are judged as unsuitable for lifestyle questionnaires. 2. Subjects who may have allergy to test foods. 3. Subjects with big covered product or fillings of the front teeth. 4. Subjects who have chronic diseases requiring regular administration, or who have severe diseases. 5. Subjects who have a medical history of serious disease e.g., diabetes, liver disease, kidney disease, and/or heart disease, thyroid gland disease, adrenal gland disease, and/or metabolic disorder. 6. Individuals who have a medical history of diseases affecting digestion and absorption. 7.Subjects who have participated other clinical studies within 1 month of giving the informed consent or who are planning to participate other clinical studies during this study. 8. Subjects who have a medical history of drug. dependence or alcohol dependence. 9. Subjects who are or willing to be pregnant, or who are breast-feeding during this study. 10. Subjects who are planning to have dental work done during this study. 11.Subjects who work in a company developing or manufacturing functional foods. 12. Subjects who are judged as unsuitable by doctor for other reasons.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Tooth staining | — |
Countries
Japan
Contacts
Public ContactKaoru Ohmori
Tsurumi University School of Dental Medicine Department of Operative Dentistry
Outcome results
None listed