Well I don't know about the "asparate" part but I take B-12, Selenium, Magnesium, and of course we get potassium through foods such as Bananas... hmmm...
Of course overdosing on Selenium I have heard also can be toxic. And when B-12 is overdosed, instead of giving energy, it can actually make you very fatigued! I know from personal experience (then later research... no more vitamin mistakes for me haha).
Keep us updated Ltc, you are our Local HCC News generator.
