Which string specifically is being tugged on in this case? Which metabolic pathway is being unbalanced? Some of the components in his cocktail is definitely beyond the daily requirements. However, excessive amounts of the water-soluble vitamins simply get flushed down the toilet, just like the money that went into buying them.

What else is being consumed? If there's a lot of coffee or other stimulants that can cause a problem too as the extra peeing can leech out some nutrients faster than others...