Our Staff

Terri H Ritchie is the owner of Advent Nutrition and is a state state licensed clinical nutritionist who holds degrees in biology and business from Neumann College and a Master of Science in Nutrition from the University of Bridgeport, CT. Additionally she received her certification as a clinical nutritionist from the International and American Association of Clinical Nutritionists and is recognized as a Certified Nutrition Specialist by the American College of Nutrition.

      A nutritional counselor since 1995, she previously worked as a research scientist for the Fitzgerald-Mercy Hospital Cancer Research Program, and has also held research positions in virology, immunology and oncology within the pharmaceutical industry. She is heard weekly on her radio show, “Mission: Nutrition”, and has been a frequent guest lecturer for Brandywine Hospital of Chester County, Mothers of Preschoolers (Berks and Chester County), Chester County Adult Night School and numerous community health symposiums throughout Chester County. She continues to update her knowledge base in nutritional therapies by attending advanced educational seminars through the Institute of Functional Medicine and nutritional post-graduate studies.


Amy Mattle, RD, LDN, Amy Mattle, RD, LDN, graduated from the University of Delaware in 1996, and previously worked at the Chestnut Hill Hospital in Philadelphia and The Upper Chesapeake Health System in Baltimore. Believing that the human body has the amazing ability to heal itself through diet and nutrition, she is passionate about helping others to utilize “food as medicine” in order to restore the optimum health of each individual she counsels. Her specialties include working with children within the Autism Spectrum, ADD/ADHD, and food sensitivity issues, and helping adults with weight loss, SIBO and other digestive disorders.