It said that eating more fibre will cut people's chances of heart disease and early death.
Reynolds' team was commissioned by the World Health Organization to inform future fiber intake recommendations.
He said: "Our research indicates we should have at least 25-29g of fibre from foods daily, although most of us now consume less than 20g of fibre daily".
Dietary fiber includes plant-based carbohydrates such as whole-grain cereal, seeds and some legumes.
The conclusion was drawn from observational studies and clinical trials covering nearly 40 years, which showed that eating between 25g and 29g of dietary fibre shows significant health benefits. Dietary fiber lowers cholesterol levels and body weight, and thus obesity-related cancers: breast cancer, endometrial cancer, esophageal cancer and prostate cancer.
One limitation of the analysis is that the studies involved only healthy individuals, so the findings do not apply to people with pre-existing chronic conditions. As per the data that is considered during the research, when 25-29 grams are taken each day, it got some higher intakes for the fiber.
This is published unedited from the PTI feed. This cholesterol-lowering type of fibre is found in fruits, vegetables and grains such as oats and barley. This may account for the links to health being less clear. The latest research is the most definitive evidence of the health benefits of a high fiber intake.
"Fibre-rich whole foods that require chewing and retain much of their structure in the gut increase satiety and help weight control, he said".
The authors of the review also stressed that these results mainly relate to natural, fibre rich foods and not the powdered, synthetic fibre which can be added to food.
"Commenting on the implications and limitations of the study, Professor Gary Frost, Imperial College London, UK, says, "[The authors] report findings from both prospective cohort studies and randomised controlled trials in tandem.
Fiber content was shown to be a better indicator of a carbohydrate food's ability to prevent disease than glycemic index, the measure of the degree to which blood glucose goes up after a particular food is eaten. Improving the accuracy of dietary assessment is a priority area for nutrition research.
"The analyses provides compelling evidence that dietary fibre and whole grain are major determinants of numerous health outcomes and should form part of public health policy".