Intervention study to verify the effect of the changes in intestinal bacteria by intake of tea catechin and inulin on visceral fat reduction

INTERVENTION: arm 1: Test foods (tea catechin‐containing powdered beverage and inulin‐containing powdered drink) are ingested once a day for 12 weeks arm 2:Control foods (placebo powdered drink) are ingested once a day for 12 weeks CONDITION: Visceral fat obese PRIMARY OUTCOME: Change in the abdominal visceral fat area SECONDARY OUTCOME: 1. Changes in the intestinal flora; 2. Changes in the waist circumference; 3. Changes in the body weight; 4. Change in the BMI; 5. Change in the body fat ratio; 6. Changes in the glucose metabolism‐related measurements (Glu, HbA1c, insulin, glycoalbumin); 7. Changes in the lipid metabolism‐related measurements (TG, HDL‐C, LDL‐C); 8. Changes in the blood biochemical test measurements (TP, ALB, GOT, GPT, gamma‐GTP, UA, BUN, Cre, CRP, VB12) other than the glucose metabolism‐related measurements and the lipid metabolism‐related measurements; 9. Changes in the hematology test measurements (WBC, RBC, HB, HT, PLT, MCV, MCH, MCHC); 10.Changes in the physiological test measurements (systolic blood pressure, diastolic blood pressure, pulse rate); 11. Changes in the liver fat mass; 12.Relationship with the questionnaire items (35 items on dietary habits, FFQ, intestinal regulation related indicators) INCLUSION CRITERIA: Those who are participants in the 2023 Iwaki Health Promotion Project Medical Checkup and meet the following inclusion criteria. ‐Inclusin criteria‐ 1. Men and women who are 20 years old or over and under 75 years of age 2. Those with BMI of 23 kg/m2 or more 3. Those with visceral fat area of 80 cm2 or more