That is all well and good for those who are able to grow their own food in soils that are optimally mineralized and then plan and consume carefully. For the vast majority of people that is either not something they are able to do or else something that is highly impractical to do. So, the next best thing is to make sure you are getting optimal amounts of all the vital vitamins, minerals and other nutrients on a daily basis by eating as healthily as possible and supplementing with items that are derived from whole food sources.
I have challenged people who say that all one has to do to get even adequate (as opposed to optimal) amounts of vitamins, minerals and other nutrients is to eat a healthy diet to provide a one week diet plan of 2000 to 2500 calories a day which will do that. Thus far, no one has even attempted to do it, because for all intents and purposes it cannot be done with the processed food and mineral depleted produce available at our grocers.