Anti-stress Effect of Theanine on Students During Long-term Pharmacy Practices

University of Shizuoka

Status: Completed

Conditions: Healthy Students

Treatments: Dietary Supplement: Theanine

Study type: Interventional

Funder types: Other

Identifiers

NCT01361204

CT2011001

Details and patient eligibility

About

Long-term practices in a hospital setting and community pharmacy might induce chronic stress in students. Alterations of salivary amylase activity will be measured in students during pharmacy practices as a marker of stress. Theanine is reported to have anti-stress effect on experimental animals under chronic stress and on humans under short-term stress. The purpose of this study is to measure stress symptoms in students during long-term pharmacy practices and to evaluate the efficacy of theanine in suppressing chronic stress, by measuring the salivary amylase activity.

Full description

The investigators have found that theanine, an amino acid in green tea, has anti-stress and anti-aging effects using experimental animals. Mice, under chronic psychosocial stress, showed shortened longevity and brain dysfunction. However, when the mice ingested theanine, they showed normal longevity and brain function even though the mice were under psychosocial stress. These data showed that theanine has a significant anti-stress effect on mice. In addition, theanine has been reported to have an anti-stress effect on humans against short-term stress by measuring salivary amylase activity. However, the efficacy of theanine against chronic stress has not been examined. Long-term pharmacy practices might induce chronic stress in students. Based on this background, the investigators designed a randomized study to evaluate the clinical efficacy of theanine ingestion in suppressing chronic stress in students during long-term pharmacy practices.

Enrollment: 20 patients

Sex: All

Ages: 22 months to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Students of pharmaceutical sciences in the fifth grade, nonsmoker
• Obtained written informed consent from the student before participation
• Possible to take tablets for 16 days
• Possible to check salivary amylase activity two times daily for 10 days

Exclusion criteria

• Taking tranquilizer(s)
• Smoker
• Diagnosed as inadequate to participate in the study by a doctor

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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20 participants in 1 patient group

Theanine

Experimental group

Description:

Experimental Comparator, theanine Taking 4 tablets of theanine two times daily for 16 days Placebo Comparator, sucrose Taking 4 tablets of sucrose two times daily for 16 days

Treatment:

Dietary Supplement: Theanine