The May/June rains are here again and with them come the common cold, the flu, and other upper respiratory infections.

With the arrival of cold and flu season, you may be tempted to turn to immune-boosting supplements to save you from a sore throat, runny nose, body aches, and the other energy-sapping side effects of this mid-year bug.

Unfortunately, most immune-boosting supplements are nothing more than a waste of money: little clinical efficacy has been shown for Vitamin C in the prevention of the common cold, save for in extremely active individuals, for whom Vitamin C may offer more protection.