With all of the conflicting stories out there about which beauty treatments, diets, or exercise trends really work, most of us tend to go off the recommendations of our friends. When your bestie is glowing after a night on the town, she may tell you that a pineapple juice cocktail saved her skin, while your endlessly energetic neighbor may share the dietary secret to unlock your own healthiest self. To tap into the wealth of this insider knowledge, I asked some of the city’s brightest faces what they stand by for the best in beauty, health, and fitness. From tricks to longer lashes and natural metabolism boosters, to how often they wash their hair – find out how these gorgeous girls-on-the-go keep it together.