1. Editor's Introduction: Skin lipids (epidermal, sebaceous, subcutaneous).- 2. Skin basics, structure and function.- 3. Skin barrier, structure and properties.- 4. Lipid oxidation and mediators in skin -- 5. Skin Ceramides -- 6. Cholesterol synthesis in epidermis.- 7. Transcriptional factors and epidermal differentiation.- 8. The brain of the skin: sebaceous gland -- 9. Sebaceous lipids.- 10. Sapienic acid and sebum specific fatty acid metabolism -- 11. Wax Esters chemistry and synthesis.- 12. Squalene chemistry and biology.- 13. Adipose tissue and fat cell biology -- 14. acial subcutaneous tissue -- 15. Monounsaturated fatty acid synthesis genes and skin/hair -- 16. Triglyceride synthesis genes and skin/hair -- 17. Lipoxygenase and skin -- 18. PPAR gamma receptor, skin lipids and hair.- 19. Mineral oils in skincare.-  20. Lipophilic antioxidants and skincare.- 21. Glycerol, Fatty alcohols, acids and esters in cosmetics.- 22. Vegetable and natural oils in cosmetics -- 23. Acne and lipid pathways.- 24. Atopic dermatitis and lipids.     .