Skip to content

Effect of Daily Ingestion of Quercetin-Rich Onion on Visceral Fat for 12 weeks: A Randomized, Double-Blind, Placebo-Controlled, Parallel Group Study

Effect of Daily Ingestion of Quercetin-Rich Onion on Visceral Fat for 12 weeks: A Randomized, Double-Blind, Placebo-Controlled, Parallel Group Study - Beneficial Effects of Quercetin-Rich Onion on Visceral Fat

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000033410
Enrollment
70
Registered
2018-07-17
Start date
2018-08-01
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy adults

Interventions

Daily ingestion 9 g of quercetin-rich onion powder for 12 weeks. Daily ingestion 9 g of quercetin-free onion powder for 12 weeks.

Sponsors

Hokkaido Information University
Lead Sponsor
1. Food Research Institute, NARO 2. Hokkaido Agricultural Research Center, NARO
Collaborator

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Subjects who fully understand significance, content and purpose of this study and who agree to participate in this study with a written informed consent. 2. Subjects whose BMI is >=23 kg/m2 and <30 kg/m2.

Exclusion criteria

Exclusion criteria: 1.Subjects who are under physician's advice, treatment, and/or medication for obese, and/or hypertension. 2.Subjects who suspected obesity. 3.Pacemaker or defibrillator users. 4.Subjects whose hospital systolic blood pressure is >=160 mmHg and/or hospital diastolic blood pressure is >=100 mmHg. 5.Subjects who have (or suspected) secondary hypertension such as renovascular hypertension, renal parenchymal hypertension, primary aldosteronism, Cushing's syndrome, hypothyroidism, hyperthyroidism, etc. 6.Subjects with serious cerebrovascular, cardiac, hepatic, renal, gastrointestinal diseases, and/or affected with infectious diseases requiring reports to the authorities. 7.Subjects with major surgical history relevant to the digestive system such as gastrectomy, gastrorrhaphy, enterectomy, etc. 8.Subjects with unusually high and/or low blood pressure and/or abnormal hematological data. 9.Subjects with severe anemia. 10.Pre- or post-menopausal women complaining of obvious physical changes. 11.Subjects who are at risk of having allergic reactions to drugs or foods especially based on onion. 12.Subjects who regularly take medicine, functional foods, and/or supplements which would affect BW and BFR. 13.Subjects who regularly take medicine, functional foods, and/or supplements which would affect blood pressure. 14.Heavy smokers, alcohol addicts or subjects with disordered lifestyle. 15.Subjects who donated either 400 ml whole blood within 16 weeks (women), 12 weeks (men), 200 ml whole blood within 4 weeks (men and women), or blood components within 2 weeks (men and women), prior to the current study. 16.Pregnant or lactating women or women who expect to be pregnant during this study. 17.Subjects who currently participate in other clinical trials, or participated within the last 4 weeks prior to the current study. 18.Any other medical and/or health reasons unfavorable to participation in the current study, as judged by the principal investigator.

Design outcomes

Primary

MeasureTime frame
Visceral fat area at 12 weeks after beginning the ingestion of test food.

Secondary

MeasureTime frame
total fat area, subcutaneous fat area, body weight, body mass index, body fat rate, abdominal circumference, hospital blood pressure, home blood pressure, TBARS, serum quercetin

Countries

Japan

Contacts

Public ContactJun NISHIHIRA, M.D., Ph.D.

Hokkaido Information University Health Information Science Center

nishihira@do-johodai.ac.jp011-385-4430

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026