We’re all repeatedly reminded of the importance for proper intake of carbohydrates, fats and protein. What also needs to be remembered, however, is having a balanced intake of dietary fibers. Dietary fibers can mainly be found in cereals, fruits and vegetables. Most people are only eating about half as much fiber as they should, with only about 5% of the U.S. population achieves reaching recommended levels.
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Most of what we believe about the health benefits of high fiber diets comes from observational studies: i.e people with a lot of fiber in their diet have lower blood pressure, improved blood cholesterol, and better insulin-sensitivity (both diabetics and non-diabetics) compared to propel with low fiber levels in their diet. Still this doesn't mean it's the FIBER per see is causing the effect. Other differences between high fiber and low fiber eaters could be causing the health benefits.
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In fact, pure fiber supplements don't always lead to the same health benefits. Thus it is more reasonable to assume that the food package in which fibers usually come from (fruits, veggies) is in part causing the health benefits rather than just the fiber.
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High fiber foods also increase satiety, making you feel fuller (thereby eating less, enhancing weight loss). Epidemiological studies show significant protective effects from consuming dietary fibers against gastrointestinal disease, stroke, cardiovascular diseases, colon cancer, and more common somatic health issues such as hemorrhoids and gastro-esophageal reflux disease. The recommended daily dietary fiber intake is 14 g of fiber per 1000 kcal.