Dietary Intake of Water-Soluble, Water-Insoluble and Total Fiber by General Japanese Populations at Middle Ages

抄録

In order to assess current dietary intake of water-soluble, water-insoluble and total fiber, fiber contents were estimated from food items in 24-hour total duplicate samples, utilizing a recently published tables of dietary fiber in foods coupled with supplemental procedures for better coverage of food items. The food duplicates were collected from 370 middle-aged Japanese subjects in 18 study sites in 12 prefectures across Japan during a period from 1990 to 1993. The coverage by the original database was 86% on an average (by weight of crude fiber-containing foods), whereas the coverage was 99% when supplemental procedures were applied in addition. The average ingested amount was 3.2 g/day for water-soluble fiber and 18.3 g/day for total fiber. No sex- or age- dependent difference was observed. Thus, current dietary intake of fiber by middle-aged Japanese people appears to be marginally sufficient. The leading sources were vegetables both for soluble (1.4 g/day) and total fiber (6.2 g/day), followed by cereals (0.3 and 3.1 g/day, respectively), fruits (0.8 and 2.7 g/day) and then pulse (0.4 and 2.3 g/day). J Epidemiol, 1995; 197-204.