An apple a day might keep away more than the doctor. HortResearch, a New Zealand company with 400 scientists studying all things fruit, has early data that suggests a specific (mystery) fruit can delay fatigue by 20 percent and increase muscle power by 70 percent. But don't raid the produce aisle quite yet. Hort won't say which fruit has shown the benefits and also notes their version is a variety bred internally for the right compound interactions. In other words, for those of use not lucky enough to be Hort test subjects, it doesn't exist.