Melanie Millan, 29, Las Vegas
After Melanie was diagnosed with gluten sensitivity in August, she overhauled her diet. Now she sleeps better, her complexion is brighter, and she has plenty of energy for her dawn workouts and evening kickball league.
Top tip: "I do boot camp on the Las Vegas Strip. We run stairs in parking garages, sprint the sidewalks, and do strength moves. It inspires me to eat well, so I don't undo my hard work."
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