The New Low-Cholesterol Diet: Oatmeal & Oat Bran

What's magic about oats? A lot

By R. Morgan Griffin
WebMD Weight Loss Clinic - Feature

Reviewed By Cynthia Haines, MD

Oatmeal, that sturdy breakfast food from your grandmother's kitchen, has a lot going for it. Not only is it a fine way to start the day, but it can also really bring down your bad LDL cholesterol levels without lowering your good cholesterol. The same goes for oat bran, which is in some cereals, baked goods, and other products.

How Do Oats Help?

Oatmeal is full of soluble fiber, which we know lowers LDL levels. Experts aren't exactly sure how, but they have some ideas. When you digest fiber, it becomes gooey. Researchers think that when it's in your intestines, it sticks to cholesterol and stops it from being absorbed. So instead of getting that cholesterol into your system -- and your arteries -- you simply get rid of it as waste.

What's the Evidence?

There's plenty of evidence that eating oatmeal lowers cholesterol levels. It's such a well-accepted belief that the FDA gave it the status of a "health claim" in 1997. This allows manufacturers to advertise the heart-healthy benefits on boxes of oatmeal and other products.

Some recent studies have shown that oats, when combined with other cholesterol-lowering foods, can have a big effect on cholesterol levels. In a study published in the American Journal of Clinical Nutrition in 2005, researchers tested cholesterol-lowering drugs against cholesterol-lowering foods in a group of thirty-four adults with high cholesterol. Oat products were among the chosen foods. The results were striking. The diet lowered cholesterol levels about as well as cholesterol drugs.