Pinterest is a great resource for homemade beauty recipes, but we sometimes stumble across pins boasting "miracle" natural remedies that don't actually pan out. Like the one that suggests using lemon juice to get rid of dark underarms. Despite seemingly convincing before and after photos of underarms lightened by rubbing lemon or lime juice directly onto dark armpits, two board-certified dermatologist told The Huffington Post they caution against trying it -- it can actually makes things worse.