Sourcing Dietary Supplements: Understanding Ingredient Origins & Quality

Question
I have always questioned the wisdom of health fanatics taking tons of dietary supplements. I always said "What if just one of those things was bad for you". You could wind up the healthiest corpse they have ever had. Now I wonder if any brands certify their ingredients are not from China?

Answer
Even if what is inside is true to what is in the container, it does not mean it is in a form you can use. The calcium in modern milk is in a form that pulls calcium out of you not add it in. The countries that use the most dairy products have the most osteoporosis and vice versa.