That would be difficult to know, Mom, because there are so many possibilities. You can also have problems if you have too much, as it would over-enable calcium to the detriment of magnesium and other electrolytes. Most people would have nerve and pain problems and bone problems, but that's hard to pin down to one particular cause. It's just so interrelaed with so many bodily processes and is so important to calcium absorption that only a regular physical with a blood test would pin it down, I'd think.