Your diet can have long-term effects on your health. Diet plays a major role in promoting and maintaining good health. It can prevent some chronic diseases while treating others. Diets can also help to speed up the recovery time for some injuries. In the past, diseases such as goitre and pellagra were relatively common as both are caused by nutritional deficiencies and cured by diets containing sufficient amounts of a particular nutrient. In the case of goitre, iodine is the missing nutrient, while with pellagra, it is mainly niacin, a B vitamin. These diseases are rare today in Jamaica because most Jamaicans get enough of these essential nutrients in their diets what is the main idea