@umbra21 - Most of the time Western diets don't really have that many problems with poor nutrition because common deficiencies are dealt with without people realizing it. Iodine in salt, for example, or folic acid in bread and B vitamins in energy drinks.
Deficiency diseases are much more common in places where they don't have these kinds of services and they don't have the knowledge or resources to feed themselves or their children well.
We are actually incredibly lucky that we live in a world where goiters are a rare occurrence and fewer people go blind from a lack of vitamin A. But these are still problems effecting other parts of the world.