Dr. Oz is challenging you and your family to spend the next 28 days on his dairy-free diet plan! Learn how simply cutting out dairy could be the secret to looking and feeling your best.

View Part 2 of Dr. Oz's Dairy-Free Challenge.

View Part 3 of Dr. Oz's Dairy-Free Challenge.

Get started on Dr. Oz's 28-Day Dairy-Free Challenge.

Want to help lower your risk of getting cancer? The answer could be in the food you eat! Dr. John Whyte, chief medical officer at WebMD and the author of "Take Control of Your Cancer Risk," says there are three kinds of foods that could really help prevent cancer: garlic, fish and grapes. And what three kinds of foods should you avoid? Red and processed meats, refined grains, and alcoholic and sugary drinks. Watch the videos below to learn more about how food could be connected to your cancer risk.