Is Loading Up On Vitamins Bad Medicine?

It appears so:

A good definition of a superstition is "a belief or practice resulting from ignorance, fear of the unknown, trust in magic or chance, or a false conception of causation." As data accumulate, taking megadoses of vitamins looks more and more like a superstition. 

But a multivitamin a day? I add it to my morning cocktail, shaken with an aspirin and an allegra.