So old coot Sumner Redstone’s secret elixir for long life is four ounces a day of a little-known superjuice called MonaVie. “It’s a miracle drug,” he told Fortune. “I feel great.” The dark purple antioxidant rich concoction has at its main ingredient the Brazilian açai berry long touted among health nuts for its anti-aging ingredients. A bottle costs $40 and is not available in stores; it’s marketed only like Avon or Tupperware. Fortune says Redstone first heard of the juice from Viacom exec Bill Roedy on a trip to Germany in January then learned that his butler’s sister-in-law was a devotee too. (No, I’m not making this up. It’s in the magazine.) “Since I’ve been on MonaVie I haven’t taken a sleeping pill,” he says. He even considered investing in Utah-based MonaVie after its CEO, nutritional products salesman Dallin Larsen, came to visit him at his Beverly Park mansion. At a recent party, Redstone gave bottles to Bill Clinton and celebrity chef Wolfgang Puck. “Just about every friend I have is on it,” Redstone says – a group he says includes Viacom and CBS board members as well as Michael Milken. Ay-yi-yi.