I totally agree with ML's recommendations of eating good quality food, and growing your own organic food.
I agree with this as well. But this is not an option for everyone. It is hard to grow your own organic food if you live in an apartment for example. And most of the food we buy in the supermarkets was picked so green that it is not going to have a lot of nutrition. And you are not going to tell high quality from low quality by looking at a plant's sugar content (brix).