Not long ago, a colleague introduced me to the wonders of Berocca, a British product that bridges hangover remedy (so I'm told) and cold preventative -- think how you feel after a long business trip. While the product is imported on a limited scale, there's also a domestic counterpart: Airborne, the "effervescent health formula." Next time you take a business trip and feel a little peaked, consider these blends of B, C, E, and other vitamins and minerals.