Protection thumb|right|Fruits and vegetables are rich in antioxidants. Antioxidants are an important group of anticarcinogenic compounds that may help remove ROS or potentially harmful chemicals. These may be found naturally in fruits and vegetables. Examples of antioxidants are vitamin A and its carotenoid precursors, vitamin C, vitamin E, polyphenols, and various other compounds. β-Carotene is the red-orange colored compounds found in vegetables like carrots and tomatoes. Vitamin C may prevent some cancers by inhibiting the formation of mutagenic N-nitroso compounds (nitrosamine). Flavonoids, such as EGCG in green tea, have also been shown to be effective antioxidants and may have anti-cancer properties. Epidemiological studies indicate that a diet rich in fruits and vegetables is associated with lower incidence of some cancers and longer life expectancy, however, the effectiveness of antioxidant supplements in cancer prevention in general is still the subject of some debate.
protection thumb|right|fruits and vegetables are rich in antioxidants antioxidants are an important group of anticarcinogenic compounds that may help remove ros or potentially harmful chemicals these may be found naturally in fruits and vegetables examples of antioxidants are vitamin a and its carotenoid precursors vitamin c vitamin e polyphenols and various other compounds β-carotene is the red-orange colored compounds found in vegetables like carrots and tomatoes vitamin c may prevent some cancers by inhibiting the formation of mutagenic n-nitroso compounds (nitrosamine) flavonoids such as egcg in green tea have also been shown to be effective antioxidants and may have anti-cancer properties epidemiological studies indicate that a diet rich in fruits and vegetables is associated with lower incidence of some cancers and longer life expectancy however the effectiveness of antioxidant supplements in cancer prevention in general is still the subject of some debate