It's well known that eating whole grains is good for your digestive system -- all that fiber keeps you regular and helps rid the body of unwanted substances, such as bad cholesterol and fats. Fiber also helps control your appetite and keep blood sugar low [source: Beare]. But a diet rich in whole grains, including oats, whole wheat and brown rice, has other anti-aging benefits because they're rich in vitamins and minerals. Eating whole grains has also been linked to a lower risk of heart disease, stroke and diabetes [source: Cassetty].
The key is to make sure the grains you're eating aren't refined, because it's the refining process that strips away many of the essential vitamins and minerals that make the grains so good for you in the first place.