1 Hair Types and Ethnicity: Classification 2 Caucasian and Mediterranean Hair 3 Indian Hair 4 African Hair 5 Asian Hair 6 Shampoos and Surfactants According to Hair Type 7 Conditioners and Silicones 8 Serums and Hair Styling Products 9 Advances in Nanotechnology-Based Hair Care Products 10 Mineral and Vegetable Oils 11 Natural Hair Dyes 12A Differences in Hair Care Practices Based on Ethnicity: African Hair 12B Differences in Hair Care Practices Based on Ethnicity: Asian Hair 12C Caucasian Hair Care: Daily Practices 13 Hair Relaxers 14 Permanent Hair Styles ("Perms") 15 Hair Dyes 16 Different Types of Braids 17 Different Types of Extensions 18 Different Types of Wigs 19 Contact Dermatitis 20 Eczema-Like Psoriasiform Skin Reaction Related to Brazilian Keratin Treatment 21 Dandruff and Seborrheic Dermatitis 22 Hair Shaft Fragility and Breakage Due to Hair Care Practices 23 Telogen Effluvium 24 Medium- and Long-Term Effects: Traction Alopecia 25 Medium- and Long-Term Effects: Central Centrifugal Cicatricial Alopecia 26 Can Hair Care Practices be Associated with Cancer? 27 Can Hair Practices Cause Hair Color Changes? 28 Can Hair Care Practices be Associated with Hair Loss or Scarring Alopecia? 29 Thin Hair 30 Straight Hair 31 Hair Care Products for Curly Hair 32 African Hair Care: Structure, Challenges, and Recommended Products 33 Damaged Hair 34 Hair Care in the Setting of Hair Loss 35 Hair Care in Pregnancy 36 Hair Care Practices in Children: Practical Tips 37 Hair Care Practices in Patients with Cancer/Post Chemotherapy 38 With or Without Sulfates 39 With or Without Silicones? 40 With or Without Fragrances 41 Less Traumatic Hair Styles for African Hair 42A How to Choose a Hair Wig for African Hair 42B Hair Wigs for Caucasians 43 How to Choose a Hair Dye: Practical Tips 44 Hair and Scalp Camouflage Techniques.