Estimated Daily Intake and Seasonal Food Sources of Quercetin in Japan

Nutrients

Haruno Nishimuro⁵  Hirofumi Ohnishi⁴  Midori Sato³  Mayumi Ohnishi-Kameyama⁵  Izumi Matsunaga⁵  Shigehiro Naito⁵  Katsunari Ippoushi⁵  Hideaki Oike⁵  Tadahiro Nagata¹  Hiroshi Akasaka⁴  Shigeyuki Saitoh⁶  Kazuaki Shimamoto² 

[1] Department of Human Nutrition, Seitoku University, Matsudo, Chiba 271-8555, Japan; E-Mail:;Sapporo Medical University, Sapporo, Hokkaido 060-8556, Japan; E-Mail:;Sobetsu-cho, Usugun, Hokkaido 052-0101 Japan; E-Mail:;School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan; E-Mails:;National Food Research Institute, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8642, Japan; E-Mails:;Sapporo Medical University School of Health Sciences, Sapporo, Hokkaido 060-8556, Japan; E-Mail:

关键词: quercetin;    onion;    green tea;    daily intake;    Japanese;    red leaf lettuce;    asparagus;   

DOI  :  10.3390/nu7042345

来源: mdpi

【 摘 要 】

Quercetin is a promising food component, which can prevent lifestyle related diseases. To understand the dietary intake of quercetin in the subjects of a population-based cohort study and in the Japanese population, we first determined the quercetin content in foods available in the market during June and July in or near a town in Hokkaido, Japan. Red leaf lettuce, asparagus, and onions contained high amounts of quercetin derivatives. We then estimated the daily quercetin intake by 570 residents aged 20–92 years old in the town using a food frequency questionnaire (FFQ). The average and median quercetin intakes were 16.2 and 15.5 mg day⁻¹, respectively. The quercetin intakes by men were lower than those by women; the quercetin intakes showed a low correlation with age in both men and women. The estimated quercetin intake was similar during summer and winter. Quercetin was mainly ingested from onions and green tea, both in summer and in winter. Vegetables, such as asparagus, green pepper, tomatoes, and red leaf lettuce, were good sources of quercetin in summer. Our results will help to elucidate the association between quercetin intake and risks of lifestyle-related diseases by further prospective cohort study and establish healthy dietary requirements with the consumption of more physiologically useful components from foods.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.