title: Frequency of soup intake and amount of dietary fiber intake are inversely associated with plasma leptin concentrations in Japanese adults.
abstract: Previous studies have shown that the intake of soup negatively correlates with the body mass index (BMI), suggesting that soup intake reduces the risk of obesity. In this study, to clarify the association of the intake of soup and various nutrients with plasma leptin concentration, a cross-sectional study on 504 Japanese adults aged 20-76 years (103 men and 401 women) was performed. The intake of soup and various nutrients was investigated by food frequency questionnaires. Plasma leptin concentration was measured in fasting blood by radioimmunoassay. The correlation was analyzed by multiple regression analysis. The average frequency of soup intake was 7.6 times/week. The average plasma leptin concentration was 7.76 ng/ml. After adjusting the confounding factors, the frequency of soup intake has a significant inverse association with plasma leptin concentration. Among the macronutrients, only dietary fiber intake negatively correlated with plasma leptin concentration after the adjustment for potential confounding factors. These results suggest that the intakes of soup and dietary fiber were negatively correlated with plasma leptin concentration in Japanese adults.
authors.affiliation: Institute for Health Fundamentals, Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kaswasaki-ku, Kawasaki 210-8681, Kanagawa, Japan. motonaka_kuroda@ajinomoto.com
authors.forename: Motonaka
authors.initials: M
authors.lastname: Kuroda
authors.forename: Masanori
authors.initials: M
authors.lastname: Ohta
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Okufuji
authors.forename: Chieko
authors.initials: C
authors.lastname: Takigami
authors.forename: Masafumi
authors.initials: M
authors.lastname: Eguchi
authors.forename: Hitomi
authors.initials: H
authors.lastname: Hayabuchi
authors.forename: Masaharu
authors.initials: M
authors.lastname: Ikeda
mesh_terms: D000328:Adult; D000368:Aged; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D004032:Diet; D004043:Dietary Fiber / Q000008:administration & dosage*; D004734:Energy Metabolism; D005247:Feeding Behavior; D005260:Female; D005502:Food; D006801:Humans; D007564:Japan; D020738:Leptin / Q000097:blood*; D008019:Life Style; D008297:Male; D008875:Middle Aged; D012044:Regression Analysis; D011795:Surveys and Questionnaires
chemical_list: D004043:Dietary Fiber; D020738:Leptin