A new study by Consumer Reports claims that eight well-known cancer tests aren't effective for most patients. What does Dr. Oz think? Find out exactly which screenings he thinks you can skip and why more isn't always better.

View Part 2 of Think Twice About These Cancer Tests.

Read more about cancer tests you should think twice about.

Watch Dr. Oz reveal the top three lifesaving cancer tests.

Watch Dr. Oz explain how you can cut your cancer risk in half at home.

You've heard of red wine and white wine but have you ever heard of blue wine? This blue version of wine is given a taste test to see how it compares to the classics.