这种东西只能意译而不能照字面逐字直译.试译为：
When people eat,nutritions go to internal organs where they are needed.If there is an illness caused by excessive intake of food,a possible solution is to find out the food in question and use it to cure the illness.
There's no saying which food is the best; anything that suits one's taste is good.
以后有古文翻译的时候,最好把你认为正确的意思用现代文表达出来.古文这种东西翻译的时候,对原文的理解特别重要.