This project will delve into the intriguing world of natural phenolic compounds, elucidating their significance, novel developments, and versatile applications across diverse industries. Focused on extracting valuable insights from plant sources, food waste, and by-products, this book aims to unravel the untapped potential of these compounds. Recent breakthroughs in the extraction, isolation, characterization, and analysis techniques have expanded our understanding of phenolic compounds. Innovative methodologies offer enhanced yields, improved purity, and a broader range of phenolic molecules to explore. The project will emphasize the application of these advancements in various sectors. In the cosmetic industry, natural phenolic compounds are gaining traction as powerful antioxidants and anti-aging agents, promoting skin health. In the realm of food, these compounds contribute to flavor, color, and nutritional value while also extending shelf life through their antimicrobial properties. The pharmaceutical domain benefits from their potential as therapeutic agents, possessing anti-inflammatory, anticancer, and cardioprotective properties. Furthermore, natural phenolic compounds find utility in environmental applications, such as wastewater treatment and pollutant removal. By assimilating recent advancements and exploring their myriad applications, this project will shed light on the immense promise of natural phenolic compounds, paving the way for innovative solutions across industries.