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Katelyn Castro, MS, RD

Registered and Licensed Dietitian Nutritionist

“My mission is to help people discover a pattern of eating that’s enjoyable, intuitive and flexible.”

Katelyn helps clients work through their values, beliefs and challenges around food and supports them on their unique path to a more healthy, balanced and authentic life.

In addition to her work at Metrowest Nutrition, Katelyn works at Boston Children’s Hospital to help children with insulin resistance and type 2 diabetes build healthy eating habits. She also works part-time at the Klarman Eating Disorder Center at McLean Hospital, where she provides meal support, cooking classes and food exposure challenges to patients with eating disorders and other mental health concerns.

Katelyn received her bachelor’s degree in Dietetics and minor in Psychology from Syracuse University. She went on to complete her master’s degree in Nutrition Science at Tufts University and dietetic internship at Tufts Medical Center, where she gained advanced skills in medical nutrition therapy and research. She then pursued further training in pediatrics and eating disorders in the Leadership Education Adolescent Health Fellowship at Boston Children’s Hospital.


  • Pediatric and Adolescent Nutrition
  • Eating Disorders and Disordered Eating
  • Endocrinology
  • Wellness
  • Intuitive Eating