Lycopene is a naturally occuring red carotenoid pigment that is responsible in red to pink colors seen in tomatoes, pink grapefruit, and other foods . Having a chemical formula of C40H56, lycopene is a tetraterpene assembled from eight isoprene units that are solely composed of carbon and hydrogen. Lycophene may undergo extensive isomerization that allows 1056 theoretical cis-trans configurations; however the all-trans configuration of lycopene is the most predominant isomer found in foods that gives the red hue. Lycopene is a non-essential human nutrient that is classified as a non-provitamin A carotenoid pigment since it lacks a terminal beta ionone ring and does not mediate vitamin A activity. However lycophene is a potent antioxidant molecule that scavenges reactive oxygen species (ROS) singlet oxygen. Tomato lycopene extract is used as a color additive in food products.
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Faculty of Dentistry, Alexandria University, Alexandria, Egypt
College of Dentistry/ University of Baghdad, Baghdad, Iraq
Marco Pirovano, Milano, Italy
Medical University of South Carolina, Charleston, South Carolina, United States
Ralph H. Johnson Veterans Administration Medical Center, Charleston, South Carolina, United States
Jesse Brown VA Medical Center, Chicago, Illinois, United States
Northwestern Memorial Hospital, Chicago, Illinois, United States
Addenbrooke's Hospital, Cambridge, Cambridgeshire, United Kingdom
Department of oral medicine & radiology, College of dental sciences, Davangere, Karnataka, India
M D Anderson Cancer Center, Houston, Texas, United States
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