This book is about a chemical known as Mandelic acid, resourced from many different plants, having multifarious applications in health-care. The major source of this Chemical is Almonds. It was believed that eating almonds soaked in warm water is good for healthy hair and flawless skin. Little was it known at that time that it contained the secret ingredient in the form of Mandelic acid. AHA (Alpha Hydroxy Acid). that was the reason for its beautifying property. Mandeli acid is finding many other avenues to express its utility. Book emphasizes the use of white biotechnology for synthesis of Mandelic acid and is written for the benefit of researchers as well as the industries involved in its synthesis and applications. Moreover, the chemistry of Mandelic acid is also tuched upon. We hope that this book will be a good support for them. The main aim of writing this book was to emphasize that present day scientific working should be with, and not against the nature. A wealth of therapeutic resources is there for the taking, if we however open our eyes to the probabilities available to us. It is important to have a good physico chemical understanding the materials that we are using.