1) Dietary fiber reduces risk of lung cancer.
A review study released in 2018 that analyzes data from 1.44 million individuals in 10 cohorts suggests that high intake of dietary fiber can reduce risk of lung cancer.
The review made public at Proceedings AACR Annual Meeting 2018 held between April 22 and 18 in Chicago Illinois shows that for increasing dietary fiber by 10 grams per day was associated with 10% reduced risk of lung cancer.
The anticancer effect was found more significant in men, whites, smokers and drinkers, but not as significant in Blacks, Asians. never smokers, and never drinkers.
Jae Jeong Yang, Danxia Yu, Yong-Bing Xiang, William Blot, Kim Robien, Rashmi Sinha, Yikyung Park, Emily White, Yumie Takata, Mattias Johansson, Wei Zheng, Xiao-Ou Shu. Dietary fiber intake and lung cancer risk: A pooled analysis of 1.44 million individuals in 10 cohorts [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 5253.
2) Dietary fiber prevents head and neck cancer
A new study published in 2019 in International Journal of Cancer suggests that eating a lot of fiber can reduce risk of head and neck cancer by as much as 60%.
The data studded came from the Prostate, Lung, Colorectal and Ovarian (PLCO) cancer screening trial. Researchers followed 101,700 participants for about 10 years during which 186 participants were diagnosed with head and neck cancer.
Compared to those whose dietary intake of fiver was in the lowest tertile, those in the highest tertile were 57% less likely to develop head and neck cancer. Those who had the highest intake of insoluble fiber were 62% less likely to contract the malignancy. Soluble fiber seems to be less effective at preventing the cancer.
Fiber intake and the risk of head and neck cancer in the prostate, lung, colorectal and ovarian (PLCO) cohort
Daisuke Kawakita Yuan‐Chin Amy Lee Lisa H. Gren Saundra S. Buys Carlo La Vecchia Mia Hashibe, 29 January 2019, Cancer Epidemiology
3) Dietary fiber linked to high survival rate among colorectal cancer patients
One study published in JAMA Oncology suggests that eating high amounts of dietary fiber can reduce risk of dying from colorectal cancer.
The study was based on data from two same old studies which have generated a lot of health reports, Nurses Health Study and Health Professionals Follow-up Study.
The study report shows that increasing intake of fiber by merely 5 grams per day was associated with 18% reduced risk of colorectal cancer related death and 14% reduced all cause death rate.
Not all dietary fibers are the same. Fiber from cereals seems to be most effective. (we do not understand why. Cereals after being processed do not contain too much fiber. Could be starch play a role in this risk reduction?). Vegetable fibers have a moderate preventative effect while fruit fibers do not have any protection.
Mingyang Song, MD; Kana Wu; Jeffrey A. Meyerhardt; Shuji Ogino; Molin Wang; Charles S. Fuchs; Edward L. Giovannucci; Andrew T. Chan, Fiber Intake and Survival After Colorectal Cancer Diagnosis, JAMA Oncol. 2018;4(1):71-79. doi:10.1001/jamaoncol.2017.3684, November 2, 2017
4) Dietary fibe reduces risk of ovarian cancer
One review of epidemiological studies published not long ago in Nutrition Journal suggests that eating fibers can reduce risk of ovarian cancer.
The review report shows that consumption of every 10 grams of dietary fiber was associated with 12% reduction in ovarian cancer risk. The risk reduction could be as much as 22%.
5) Dietary fibre linked to reduced risk for prostate cancer
Published in Cancer Research journal, another study hints that eating a lot of fiber can lower risk of prostate cancer significantly.
The study released in Proceedings: AACR Annual Meeting 2018 held on April 14 through April 18, 2018 in Chicago, Illinois shows that prostate cancer patients who ate 8 or more grams of fiber from grains per day were 14% less likely to die from prostate cancer, compared to those who ate only 2 or fewer grams of fibers.
The study does not find any correlation between consumption of fiber from fruits and vegetables and risk of prostate canecr death risk.
Elkhansa Sidahmed, Stephen J. Freedland, Molin Wang, Kana Wu, Jeanine M. Genkinger, Stephanie A. Smith-Warner. A pooled analysis of dietary fiber intake and risk of prostate cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 5255.