How can I consume health functional foods appropriately?

These days, I wonder if health functional foods that we eat for our health might actually be an addiction.
I don't think there's anyone who doesn't take at least one health functional food.
There is no one who does not have at least a vitamin C jelly or candy in their mouth.
It is true that health functional foods are good to eat, but it is a shame not to have them.
But surprisingly, it is not easy to eat it.
If I just pack as I please, I end up with duplicates or not getting everything I need.
Of course, it is okay to divide the time and take all the necessary health functional foods.
Because overdoing it isn't always good.
So, is there a way to determine exactly what nutrients I need and take the right amount?