BACKGROUND: Insufficient intake of dietary fiber (DF) is currently a major problem in the overall promotion of health in the general population in Japan. AIM OF THE STUDY: To analyze the time trends in DF intake, including DF density (total DF intake/1,000 kcal), and the ratio of water-insoluble fiber to water-soluble fiber (IS ratio) in Japan. METHODS: The time trend in DF intake in Japan was calculated from data compiled in the Japanese National Nutrition Survey. RESULTS: The mean daily DF intake (total DF intake) in 1952 was 20.5 g/day, which rapidly declined to about 70 % of the 1952 level in 1970, after which there was little change to 1998. DF density in 1952 was 9.7 g/1000 kcal, which declined by about 30 % in 1970, and remained at about the same level to 1998. The IS ratio has remained stable over this period. Whereas total DF intake and DF density in Japan are similar to those in Western countries, the IS ratios are higher in Japan. Therefore, the higher incidence of, and mortality from, colon diverticulosis, coronary heart disease, hyperlipidemia, etc., which are all thought to be related to fiber deficiency, in Western countries compared to Japan might be due to the differences in the IS ratio. CONCLUSIONS: A decline in total DF intake and DF density is predicted for Japan in the future, because these parameters were lower among the younger generation. This may be due to the marked changes in the dietary habits of the younger generation, and is a problematic trend for Japanese health.
BACKGROUND: Insufficient intake of dietary fiber (DF) is currently a major problem in the overall promotion of health in the general population in Japan. AIM OF THE STUDY: To analyze the time trends in DF intake, including DF density (total DF intake/1,000 kcal), and the ratio of water-insoluble fiber to water-soluble fiber (IS ratio) in Japan. METHODS: The time trend in DF intake in Japan was calculated from data compiled in the Japanese National Nutrition Survey. RESULTS: The mean daily DF intake (total DF intake) in 1952 was 20.5 g/day, which rapidly declined to about 70 % of the 1952 level in 1970, after which there was little change to 1998. DF density in 1952 was 9.7 g/1000 kcal, which declined by about 30 % in 1970, and remained at about the same level to 1998. The IS ratio has remained stable over this period. Whereas total DF intake and DF density in Japan are similar to those in Western countries, the IS ratios are higher in Japan. Therefore, the higher incidence of, and mortality from, colon diverticulosis, coronary heart disease, hyperlipidemia, etc., which are all thought to be related to fiber deficiency, in Western countries compared to Japan might be due to the differences in the IS ratio. CONCLUSIONS: A decline in total DF intake and DF density is predicted for Japan in the future, because these parameters were lower among the younger generation. This may be due to the marked changes in the dietary habits of the younger generation, and is a problematic trend for Japanese health.
Authors: Jung Min Kang; Dong Wook Shin; Young Min Kwon; Sang Min Park; Min Sun Park; Jin Ho Park; Ki Young Son; Be Long Cho Journal: World J Gastroenterol Date: 2011-08-14 Impact factor: 5.742
Authors: Yi Lin; Inge Huybrechts; Carine Vereecken; Theodora Mouratidou; Jara Valtueña; Mathilde Kersting; Marcela González-Gross; Selin Bolca; Julia Wärnberg; Magdalena Cuenca-García; Frederic Gottrand; Elisabetta Toti; Sonia Gomez-Martínez; Evangelia Grammatikaki; Idoia Labayen; Luis A Moreno; Michael Sjöström; John Van Camp; Romana Roccaldo; Emma Patterson; Yannis Manios; Denes Molnar; Anthony Kafatos; Kurt Widhalm; Stefaan De Henauw Journal: Eur J Nutr Date: 2014-08-17 Impact factor: 5.614
Authors: Aurélien Trompette; Eva S Gollwitzer; Koshika Yadava; Anke K Sichelstiel; Norbert Sprenger; Catherine Ngom-Bru; Carine Blanchard; Tobias Junt; Laurent P Nicod; Nicola L Harris; Benjamin J Marsland Journal: Nat Med Date: 2014-01-05 Impact factor: 53.440