Fiber could promote health via several mechanisms, including helping to control weight, improving glycemic control, and aiding in the maintenance of a favorable intestinal environment. Fiber may help protect against circulatory diseases by lowering low density lipoprotein (LDL) cholesterol, which, when elevated, is a major risk factor for cardiovascular disease. Fiber intake has also been associated with a reduction in inflammatory markers including C-reactive protein, interleukin-6 and tumor necrosis factor-alpha. The authors note that greater total fiber intake could be a marker of an overall dietary pattern that benefits health.
"We observed inverse associations between total dietary fiber intake and mortality, and specifically mortality from circulatory, digestive, and non-cardiovascular disease, noncancer inflammatory diseases," the authors conclude. "These results show that high fiber intake, mainly from cereals and vegetables, may reduce the risk of death from these diseases."