My logic: Q: how many people take vitamin D? A: not many Q: how many would take it if they knew they need it? A: a lot Q: what can we do about it? A: spen

My logic: Q: how many people take vitamin D? A: not many Q: how many would take it if they knew they need it? A: a lot Q: what can we do about it? A: spend X on "marketing" so they know they should take it, or spend 1000*x on giving people stuff they can buy themselves