Book excerpt: Dr. Natasha Campbell-McBride set up The Cambridge Nutrition Clinic in 1998. As a parent of a child diagnosed with learning disabilities, she is acutely aware of the difficulties facing other parents like her, and she has devoted much of her time to helping these families. She realized that nutrition played a critical role in helping children and adults to overcome their disabilities, and has pioneered the use of probiotics in this field. Her willingness to share her knowledge has resulted in her contributing to many publications, as well as presenting at numerous seminars and conferences on the subjects of learning disabilities and digestive disorders. Her book Gut and Psychology Syndrome captures her experience and knowledge, incorporating her most recent work. She believes that the link between learning disabilities, the food and drink that we take, and the condition of our digestive system is absolute, and the results of her work have supported her position on this subject. In her clinic, parents discuss all aspects of their child's condition, confident in the knowledge that they are not only talking to a professional but to a parent who has lived their experience. Her deep understanding of the challenges they face puts her advice in a class of its own.