Double-Blind, Placebo-Controlled Study for the Effect of Daily Ingestion of Yabukita green tea and Sun Rouge green tea on the Improvement of Blood Pressure and Eyestrain

INTERVENTION: Ingestion of Yabukita green tea daily for 12 weeks Ingestion of Sun Rouge green tea daily for 12 weeks Ingestion of barley tea for 12 weeks CONDITION: Healthy adults PRIMARY OUTCOME: systolic blood pressure and diastolic blood pressure (hospital blood pressure and home blood pressure), focus‐adjustment function SECONDARY OUTCOME: VAS questionnaire for eyestrain symptoms, intraocular pressure, peripheral blood flow, MDA‐LDL,TBARS,SOD,8‐OHdG, hs‐CRP,adiponectin, ADMA, blood RNA related to functional expression of the green tea‐component, total homocysteine, LDL‐C INCLUSION CRITERIA: Subjects whose blood pressure meet either of the following criteria 1. Hospital SBP is 130 mmHg or more and less than 160 mmHg and DBP is less than 100 mmHg 2. Hospital DBP 80 mmHg or more and less than 100 mmHg and SBP is less than 160 mmHg 3. Home SBP is 125 mmHg or more and less than 155 mmHg and DBP is less than 95 mmHg 4. Home DBP is 75 mmHg or more and less than 95 mmHg and SBP is less than 155mmHg Subjects who agree to participate in the current study with a written informed consent