Youth may be wasted on the young, but luckily, you can buy it back. People are using everything from face-lifts to second skin tech to keep their youthful advantage. However, with the many unproven therapies on the market, how many actually work? This episode examines our evolutionary leanings toward finding youth appealing and pop-cultural portrayals of youth, before diving head-on into the strange, fascinating and unregulated world of the anti-aging industry. "A User's Guide to Cheating Death" is in search of the truth for those who try to defy aging.