Upping your collagen intake, such as through collagen peptide supplements, has been shown to support natural levels in your body1, resulting in a healthier complexion and more hydrated skin.* To improve your gut health, eat fermented foods like kimchi and sauerkraut. Make sure you buy refrigerated brands, which contain large amounts of live bacteria. So if you’re serious about feeling younger than you are, add all of these foods to your diet—and eat them daily if you can. A weight-loss and natural anti-aging expert, Petrucci is a concierge doctor for celebrities in New York City and Los Angeles. She is a board-certified naturopathic physician and a certified nutrition consultant. Dr. Petrucci attended Temple University and St. Joseph’s University before doing postgraduate work in Europe, studying naturopathic medicine in England and Switzerland. She is one of the few practitioners in the United States certified in biological medicine by the esteemed Dr. Thomas Rau of the Paracelsus Klinik Lustmuhle in Switzerland. Petrucci is a weekly contributor on Dr. Oz and appears regularly on Good Morning America and other national news programs. As the driving force behind the popular website drkellyann.com. Currently, Petrucci is focusing much of her attention on developing innovative beauty- and food-based products.