Ninety-six percent of Americans believe that knowing their family health history is important, but only one-third of people have ever tried to write it down. This holiday season, learn your family's medical history. Dr. Oz has the critical questions you need to ask. 

Click here for Part 1 of Learn Your Family History.

Click here for Dr. Oz’s Family History Worksheet. 

Click here to join Dr. Oz’s Transformation Nation. 

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.