Prunus dulcis is called Lawz in Arabic and Baadaam in Hindi, Punjabi, Telugu, Gujarati, Turkish, Urdu, Persian and Kashmiri. This Book describes the Classification, Nutritional value, Health benefit, Chemical Composition, Habitat, History, Antioxidant Activity and uses of Prunus dulcis. Also have data related to Bitter and Sweet Prunus dulcis and their constituents, and describe the bitterness factor in Prunus dulcis. Comparative study between Pakistani and American Prunus dulcis were performed by comparing the constituents percentage in both with the help of 1,1-Diphenyl-2-picrylhydrazyl radical scavenging activity, Total Antioxidant Activity by Phosphomolybdenum Method and Gas chromatography¿mass spectrometry analysis.