Tiny but mighty, flax seeds have earned their place on the superfood list—and for good reason. Packed with fiber, omega-3s, ...

5. Apple. One medium apple with the skin has about 4 grams of fiber (1 gram soluble).. Apples also contain quercetin, a ...

Soluble fiber absorbs water to form a gel that softens and bulks up stool, while insoluble fiber adds roughage to help everything pass through more quickly. Together, they keep your digestion on ...