The book delves into various aspects of the hair care industry, providing a comprehensive understanding of hair throughout history, its anatomy and physiology, genetics and molecular mechanisms of hair color, and the raw materials used in the industry. It explores the diverse range of hair care products, including oils, dyes, lotions, and serums, and emphasizes the importance of global regulatory approaches to ensure consumer health and safety, particularly in relation to nano-formulations and synthetic hair care products. The book also addresses the safety and efficacy of herbal care products from a global regulatory perspective. Furthermore, it examines the impact of the microbiome on hair care products, highlighting the opportunities and challenges in complying with global regulations. The evaluation of hair care product safety is discussed within a global context, exploring different models and methods. The book also focuses on the journey of hair care products from laboratory testing to market, emphasizing clinical and preclinical assessments in compliance with global regulations. It highlights the role of ex-vivo hair follicle models in ensuring the safety and effectiveness of hair care products while providing a global regulatory framework. Additionally, the book explores the potential of artificial intelligence in predicting hair product toxicity, taking a global perspective. It delves into omics approaches for hair toxicity assessment, discussing current advances and future directions in this field. The next generation of hair products is also explored, with a focus on innovations that prioritize safe and healthy consumer choices. Finally, the book provides an overview of global regulatory frameworks for the hair care industry, including key agencies and guidelines. It serves as a valuable resource for professionals and researchers in the field, offering insights into the historical, scientific, and regulatory aspects of hair care products and their impact on consumer health and safety.