This book is a required text for the Nutritional Therapy Association’s
Nutritional Therapy Practitioner (NTP) Certification Program.
This book is a required text for the Nutritional Therapy Association’s
Nutritional Therapy Practitioner (NTP) Certification Program.

Dr. Gaby has combined his analysis of more than 50,000 research studies and his clinical experience to produce the definitive textbook on nutritional therapy.
Nutritional Therapy discusses more than 400 different health conditions and disorders. It also contains 61 chapters on individual therapeutic agents (vitamins, minerals, amino acids, and other natural substances) including biochemical effects, therapeutic uses, signs and symptoms of deficiency, adverse effects, drug interactions, nutrient interactions, and dosage and administration. Chapters on fundamentals of nutritional therapy (including dietary fundamentals, food additives, hypoglycemia, food allergy, “sublaboratory” hypothyroidism, and candidiasis) are also included.
Nutritional Therapy has more than one million words (about 12 times the size of an average size book) and over 16,900 references to the scientific literature.