As I mentioned earlier, we can tell the difference between natural uranium and depleted uranium by what's called the isotopic signature, which is a fancy way of saying we can tell the difference through physical and chemical means. That's important to veterans, because they want to know, yes or no, were they exposed to depleted uranium.
However, the health implications of uranium exposure do not depend on the isotopic signature. What determines that, your health outcome, is the burden of total uranium in the body. We have determined that most of the risk is through the uranium's chemical effects as a heavy metal, as opposed to its radioactive effects.
I'll stop there for fear of saying too much and burning up your time. If there's something specific you want me to clarify, I will.