Cold and Flu

The common cold, including chest cold and head cold, and seasonal flu are caused by viruses. Use over-the-counter cold medications to relieve symptoms including sore throat, runny nose, congestion, and cough. Flu symptoms are similar, but include fever, headache and muscle soreness.

Vitamin C, vitamin D, zinc, and other supplements may provide an edge against colds and the flu, but they should only serve to complement your main defensive arsenal: good hygiene, proper hydration, healthy diet, restful sleep, stress control, and exercise.