Redefine your golden years and shake off the perceived notions about growing old. Dr. Oz explores the science of aging and shows you what you can do to tap into the fountain of youth. Here, Dr. Oz's good friend and the Enforcer, Dr. Roizen, reveals his real age and lets you in on the foods you should eat to achieve longevity.

Click here to watch Part 1. A very special guest shares his secrets and proves that you can still live life to the fullest well after retirement; he bikes, swims and weight trains - and you'll never believe his age.

Click here to take Dr. Oz's Anti-Aging Quiz. Click here for Dr. Oz's Longevity Grocery List.

Sponsored by Biotivia - for more information on resveratrol click here. Animation produced by Visible Productions Inc.

Dr. Oz goes where he's never gone before. He's letting you eat fast-food and it's not what you expect. Learn which fast food meals you can eat under 500 calories while still enjoying the food you love.