Estimated Daily Intake and Seasonal Food Sources of Quercetin in Japan

Nutrients

卷:7

Tadahiro Nagata¹  Masuko Kobori²  Hideaki Oike²  Shigehiro Naito²  Haruno Nishimuro²  Mayumi Ohnishi-Kameyama²  Izumi Matsunaga²  Katsunari Ippoushi²  Shigeyuki Saitoh³  Kazuaki Shimamoto⁴  Hirofumi Ohnishi⁵  Hiroshi Akasaka⁵  Midori Sato⁶ 

[1] Department of Human Nutrition, Seitoku University, Matsudo, Chiba 271-8555, Japan;

[2] National Food Research Institute, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-8642, Japan;

[3] Sapporo Medical University School of Health Sciences, Sapporo, Hokkaido 060-8556, Japan;

[4] Sapporo Medical University, Sapporo, Hokkaido 060-8556, Japan;

[5] School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan;

[6] Sobetsu-cho, Usugun, Hokkaido 052-0101 Japan;

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

DOI  :  10.3390/nu7042345

来源: DOAJ

【 摘 要 】

Quercetin is a promising food component, which can prevent lifestylerelated diseases. To understand the dietary intake of quercetin in the subjects of apopulation-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】

Unknown