WHAT: Over-the-counter immune booster to fight colds (Americans contract an estimated 1 billion annually!), from Pharmavite Corp. KEY INGREDIENT: Andropan, 4% standardized extract of the plant Andrographis paniculata. New to the U.S., it has been part of Chinese and ancient Indian medicine for 2,000 years.THE SCIENCE: Studies in Sweden and Chile found it promotes upper-respiratory health.DIRECTIONS: Take four times a day, starting at the first chest or head symptoms. See a doctor after five days if you don't feel better.BONUS: No sleepiness or feeling wired.COST: 20 tablets for $6.49 at CVS, Costco, Target and Walgreens, or call 1-800-314-4372 to locate a store near you..Related articles?