The evidence is pretty clear: eat enough fiber and you’re more likely to live a long, healthy life. • According to the Institute of Medicine, children and adults should consume 14 grams of fiber for every 1,000 calories of food eaten. • Only insoluble fiber can’t be processed by your body and goes right through you. Soluble fiber turns into a fatty acid in the gut and contains somewhere between 2 to 4 calories per gram.
