Our Coaching Team

Karen Leibowitz, MD and Pediatric GI/Nutrition Specialist, Founder and CEO

Karen Leibowitz

Karen L. Leibowitz, MD – “Dr. Karen” – is a Board-Certified physician in Pediatric Gastroenterology and Nutrition, with a long-standing interest in family wellness, pediatric obesity and weight-related complications. In addition to her strong clinical passion, Dr. Karen has performed and published a variety of research projects in these fields. She has also given numerous national and international presentations and lectures on obesity and GI topics. Since 1996, Dr. Karen has been involved in a variety of obesity treatment and prevention programs that promote healthy lifestyle changes: she has worked with Native American children in Oklahoma and Texas; assisted in the obesity program at the Childrenʼs Hospital of Philadelphia; and spearheaded the development and implementation of the “Healthy ME: Pediatric Lifestyle Changes Program” at Rutgers-Robert Wood Johnson Medical School. The success of the Healthy ME program, as well as her passion for working with children and families on issues of health and wellness, led Dr. Karen to create KareBoost Health. Through this holistic program, Dr. Karen and her multi-disciplinary health and wellness team can coach clients to adopt over time life changing


In addition to Kareboost Health’s Coaching Team, Kareboost Health works with NJ Pediatric & Family Nutrition, LLC and its owner, Andrea Berez

Andrea Berez, MS, RD, CSP – Pediatric Registered Dietitian

Andrea BerezAndrea Berez, a Registered Dietitian and a Certified Specialist in Pediatric Nutrition, uses her passion and motivational-interviewing counseling style to help children, teenagers and families effectively address health and weight-related issues. Whether challenged with eating disorders, overweight, obesity, disordered eating, gastrointestinal-related conditions or general wellness needs, Andrea helps her clients set their individual goals and work toward long-lasting health and lifestyle changes. Since 2004, Andrea has been involved in coordinating, counseling and doing research for various multidisciplinary pediatric and family weight management programs, including A New Weigh and Healthy ME: Pediatric Lifestyle Changes Program at Rutgers-Robert Wood Johnson Medical School. She creates innovative and exceptionally fun programs that effectively meets her clients’ needs.

Andrea’s role in The KB Way:

  • Provides detailed dietary guidance and information for weight management
  • Addresses nutritional needs by focusing on tailored meal plans for specific health conditions, such as pre-diabetes/diabetes, high cholesterol, high blood pressure, eating disorders, sports nutrition, food allergies, picky eaters and Irritable Bowel Syndrome (FODMAP Diet for IBS)
  • Provides nutritional guidance throughout your child’s developmental stages (from pregnancy, breastfeeding, baby’s first foods to table foods)