Nutritional genomics has a wide range of applications. Some illnesses (diabetes, metabolic syndrome) can be detected with individualized assessment. By screening individuals and determining particular nutritional requirements, nutrigenomics can assist with individualized health and nutrition intake. The research focuses on the prevention and treatment of specific genetic illnesses. Obesity, coronary heart disease (CHD), hypertension, and diabetes mellitus type 1 are examples of genetically connected illnesses that improve with nutritional adjustment. Spina bifida, alcoholism, and phenylketonuria are examples of genetic illnesses that can be averted by good dietary intake of parents