For improving basic health
That's how I see it too. You see areas where you are lacking. You might be able to correct it by choosing the right foods, but nowadays, I have my doubts some foods are what they should be for our body, even when we talk about base ingredients.
That's where food supplements could help. Thanks for the book recommendation.
With our recent election results, this topic (of your post) will be hotly debated here in America for some time to come. "Elections have consequences!" Yep. We'll see how it goes.
I'm assuming the two sides have opposite opinions about the use of food supplements. I don't have a problem with that. Tell the side which doesn't like them to make better food, and I'd be ok with that.