Chapter 1: Gut-Skin Axis: Role in Health and Disease.- Chapter 2: Mechanistic role of probiotics in improving skin health.- Chapter 3: Skin microbiome & host immunity: applications in regenerative cosmetics & transdermal drug delivery.- Chapter 4: Probiotics and their various forms supporting skin health.- Chapter 5: Topical Probiotics: Scope and challenges.- Chapter 6: Status of using Probiotic supplementation in Acne.- Chapter 7: Probiotics effects on skin health: the case of photoprotection as a model of gut-skin dialog.- Chapter 8: Relationship between Probiotics and Gut-Skin Axis in Skin Wound Healing: a Recent Update.- Chapter 9: Probiotics for Atopic Dermatitis: An Update.- Chapter 10: Safety concerns, regulatory guidelines, current market trends and future directions towards use of probiotics in gut-brain-skin axis.- Chapter 11: Probiotics as Edible Vaccines.