The article talked about the food and nutrition that can prevent cancer by eating natural food . Thailand is widely known to have a rich flora with the populace making frequent use of unique vegetables or fruits for flavours, spices or condiments in their traditional cuisine. Thus, Thai edible plants, especially those eaten for purposes other than nutrition may be promising sources for biologically active compounds including anti-tumour promoters. Possible anti-tumour promoters from the Thai edible plants Cymbopogon citratus lemon grass or lapineC. citratus (Gramineae) is widely distributed throughout South-east Asia. The leaves and stem of the young plant are reported to have anti-fungal, repellent, and bacteriostatic activities53. It also has traditionally been used as a tonic or in perfume on account of its lemon-like fragrance. Two isomeric monoterpene aldehydes.