Dietary fiber intake provides numerous health benefits, including reduced risk of coronary heart disease, stroke, hypertension, diabetes, obesity, and certain gastrointestinal diseases. However, average fiber intakes in the US are below recommended levels. Increasing fiber intake lowers blood pressure, serum cholesterol, and improves glycemia and insulin sensitivity. Fiber supplementation in obese individuals enhances weight loss. It also benefits gastrointestinal disorders like constipation and hemorrhoids. Prebiotic fibers may enhance immune function. Dietary fiber benefits children and adults similarly, with a recommended intake of 14 g/1000 kcal. Effective communication and education are needed to increase fiber consumption. Dietary fiber intake is associated with lower risks of cardiovascular diseases, including coronary heart disease (CHD), stroke, and hypertension. Prospective studies show that high fiber intake is linked to lower CHD prevalence. However, specific effects of fiber on CHD require further clinical trials. Soluble fibers, such as guar gum, pectin, and barley β-glucan, reduce LDL-cholesterol. Psyllium and oat β-glucan are approved for health claims related to CHD protection. Long-term studies show that soluble fibers can sustain significant hypocholesterolemic effects. Dietary fiber intake is associated with lower blood pressure, especially in hypertensive individuals. It also improves body weight, visceral adiposity, and insulin sensitivity. Fiber intake may reduce the risk of diabetes, with high fiber intake linked to a 29% lower risk of developing diabetes. Fiber supplements improve glycemic control and insulin sensitivity in both non-diabetic and diabetic individuals. Dietary fiber recommendations for diabetics include 25–50 g/day, with a focus on whole grains, legumes, and vegetables. Dietary fiber intake is associated with lower obesity rates. High fiber intake may reduce weight gain and obesity risk. Fiber supplements can lead to modest weight loss, with studies showing greater weight loss compared to placebos. High-fiber diets and fiber supplements are effective in weight management. Dietary fiber affects gastrointestinal function, including delayed gastric emptying, increased fecal mass, and improved regularity. It may reduce the prevalence of gastrointestinal disorders like GERD, duodenal ulcers, diverticulitis, constipation, and hemorrhoids. Fiber supplements are effective in managing these conditions. Dietary fiber plays a role in the immune system, with prebiotic fibers like inulin and oligofructoses promoting the growth of beneficial bacteria. These bacteria produce short-chain fatty acids and stimulate the immune system. Prebiotic fibers may also help in treating inflammatory bowel disease. Dietary fiber is important in childhood, contributing to normal gastrointestinal function, preventing obesity, and reducing future chronic disease risks. Fiber intake is linked to lower constipation rates and improved nutrient intake in children. Fiber may also play a role in preventing and treating childhood obesity. Overall, dietary fiber intake is associated withDietary fiber intake provides numerous health benefits, including reduced risk of coronary heart disease, stroke, hypertension, diabetes, obesity, and certain gastrointestinal diseases. However, average fiber intakes in the US are below recommended levels. Increasing fiber intake lowers blood pressure, serum cholesterol, and improves glycemia and insulin sensitivity. Fiber supplementation in obese individuals enhances weight loss. It also benefits gastrointestinal disorders like constipation and hemorrhoids. Prebiotic fibers may enhance immune function. Dietary fiber benefits children and adults similarly, with a recommended intake of 14 g/1000 kcal. Effective communication and education are needed to increase fiber consumption. Dietary fiber intake is associated with lower risks of cardiovascular diseases, including coronary heart disease (CHD), stroke, and hypertension. Prospective studies show that high fiber intake is linked to lower CHD prevalence. However, specific effects of fiber on CHD require further clinical trials. Soluble fibers, such as guar gum, pectin, and barley β-glucan, reduce LDL-cholesterol. Psyllium and oat β-glucan are approved for health claims related to CHD protection. Long-term studies show that soluble fibers can sustain significant hypocholesterolemic effects. Dietary fiber intake is associated with lower blood pressure, especially in hypertensive individuals. It also improves body weight, visceral adiposity, and insulin sensitivity. Fiber intake may reduce the risk of diabetes, with high fiber intake linked to a 29% lower risk of developing diabetes. Fiber supplements improve glycemic control and insulin sensitivity in both non-diabetic and diabetic individuals. Dietary fiber recommendations for diabetics include 25–50 g/day, with a focus on whole grains, legumes, and vegetables. Dietary fiber intake is associated with lower obesity rates. High fiber intake may reduce weight gain and obesity risk. Fiber supplements can lead to modest weight loss, with studies showing greater weight loss compared to placebos. High-fiber diets and fiber supplements are effective in weight management. Dietary fiber affects gastrointestinal function, including delayed gastric emptying, increased fecal mass, and improved regularity. It may reduce the prevalence of gastrointestinal disorders like GERD, duodenal ulcers, diverticulitis, constipation, and hemorrhoids. Fiber supplements are effective in managing these conditions. Dietary fiber plays a role in the immune system, with prebiotic fibers like inulin and oligofructoses promoting the growth of beneficial bacteria. These bacteria produce short-chain fatty acids and stimulate the immune system. Prebiotic fibers may also help in treating inflammatory bowel disease. Dietary fiber is important in childhood, contributing to normal gastrointestinal function, preventing obesity, and reducing future chronic disease risks. Fiber intake is linked to lower constipation rates and improved nutrient intake in children. Fiber may also play a role in preventing and treating childhood obesity. Overall, dietary fiber intake is associated with