Preface.- 1. Introduction.- 2.Brief History of Human Nutrition.- 2.1 Prehistory.- 2.2 Antiquity.- 2.3 From Galen to Lind.- 2.4 From Lavoisier to the Modern Sciences.- 2.5 From Hopkins to the Present.- 3. Nutrition Basics.- 3.1 The Food Pyramid.- 3.2 World Nutrition Facts.- 4. The Hair Cycle and its Relation to Nutrition.- 5. Nutritional Disorders of the Hair and their Management.- 5.1. Inborn Errors of Metabolism.- 5.1.1 Copper.- 5.1.2 Zinc.- 5.1.3 Biotin.- 5.1.4 Amino Acids.- 5.2 Acquired Deficiency Disorders.- 5.2.1 Protein-Calorie Malnutrition.- 5.2.2 Biotin Deficiency.- 5.2.3 Vitamin C Deficiency.- 5.2.4 Vitamin B12 Deficiency.- 5.2.4 Niacin Deficiency.- 5.2.5 Deficiency of Essential Fatty Acids.- 5.2.6 Iron Deficiency.- 5.2.7 Zinc Deficiency.- 5.2.8 Copper Deficiency.- 5.2.9 Selenium Deficiency.- 5.2.10 Vitamin D Deficiency.- 5.3 Complex Nutritional Disorders.- 5.3.1 Gluten Sensitivity.- 5.3.2 Junk Food and Obesity.- 5.3.3 Deficiencies from Bariatric Surgery.- 5.3.4 Anorexia and B