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Oatmeal

You may have noticed a heart-shaped seal on your box of oatmeal recently. The seal's there because oats contain beta-glucan, a type of fiber that's been shown to help lower cholesterol when eaten regularly. Need another reason to dig in? Oats are also rich in omega-3 fatty acids, folate, and potassium.

Steel-cut oats, which take about 15 minutes to cook, contain more fiber than rolled oats or instant varieties, but any type of oatmeal is a healthy choice. Just avoid the flavored kinds, which can be packed with sugar. Instead, sweeten your bowl with milk and a bit of honey, and top with fruit and nuts.

Next: Greek yogurt