What do Darth Vader, King Kong, and an ice cream sundae all have in common? They’re all destructive, havoc-wreaking villains. But if you look deeper, you discover that they all have a good side, as well. Kong may have made a mess of Midtown Manhattan, but his animal rage was driven by his love for Fay Wray. Sure, Lord Vader wanted to destroy the Jedi, but when push came to shove, he put Skywalker first. And, well, the same is true of the ice cream sundae sitting in your dish. It might have a bit more sugar than your body needs (technically your body doesn’t need any sugar), but ice cream also delivers calcium, which binds to fatty acids in the digestive tract and blocks their absorption. And ½ cup gives you 17 milligrams of choline, which can lower homocysteine. What’s homocysteine? An amino...