Carolyn F. Katzin, MS, CNS, MNT is a Certified Nutrition Specialist and Medical Nutrition Therapist with more than twenty years of experience. She is oncology nutritionist at Beverly Hills Cancer Center, Eisenhower Lucy Curci Cancer Center, and Premiere Oncology. She serves on the American Cancer Society California Division Board of Directors and is a member of the National Nutrition and Physical Activity Workgroup. She is the author of The Cancer Nutrition Center Handbook and a coauthor of Nutrition and Physical Activity During and After Cancer Treatment: An American Cancer Society Guide for Informed Choices. She is a member of the American Association for Cancer Research, American Society for Nutrition, and American College of Nutrition. Her website is www.cancernutrition.com.