Validation study about test food-ingesting effects on visceral fat area and gut microenvironment

INTERVENTION: Consumption of the test food‐1 twice a day for 12 weeks. Consumption of the test food‐2 twice a day for 12 weeks. Consumption of the placebo food twice a day for 12 weeks. CONDITION: Healthy male/female adults PRIMARY OUTCOME: Visceral fat area (impedance method) SECONDARY OUTCOME: 1. Abdominal total fat area (impedance method); 2. Abdominal subcutaneous fat area (impedance method); 3. Abdominal circumference; 4. Body weight; 5. Body‐mass index; 6. Body fat percentage (impedance method); 7. Body fat quantity (impedance method); 8. Blood pressure; 9. Adiponectin; 10. Gut microbiota (amplicon sequencing analysis); 11. Short chain fatty acids and IgA in feces; 12. Total cholesterol, low density lipoprotein‐cholesterol, high density lipoprotein‐cholesterol, glucose INCLUSION CRITERIA: