Thanks in part to powerful brands like Whole Foods, the U.S. has seen a rise in motivation to lead a healthy lifestyle- particularly in major metropolitan areas such as New York, Chicago, Philadelphia and San Francisco. For every retail brand that has closed a brick-and-mortar store over the past decade, it seems that a health-related business has sprung up in its place. From juice bars to treadmill bars, it is clear that “healthy is the new black” for the latest....