Claudia Johnsen PhD is an author of several books on diet, herbs, cooking, developmental diet and is also a licensed nutritionist and internationally certiied lactation consultant. Her PhD work was on infant nutrition and breastfeeding. She maintains a private practice in Massachusetts. Christopher Johnsen MS DC is a chiropractor and nutritionist. He is the author of several books on health, rehabilitation, diet and classical studies. He also maintains a private chiorpractic practice in Springfield, Massachusetts.