This book, for the first time, has gathered native descriptions of Hot and Cold theory in different traditional medicines, including traditional Chinese medicine, Persian (Humoral, Unani) medicine, Ayurvedic medicine and Latin American and Caribbean medicines. After defining the common ground, contemporary research - in nutrition, pharmacology, physiology and systems biology - has been explored using scientific methodology. This work is the result of an international collaboration of more than 30 scientists and scholars with high reputations intheir fields.