Unfortunaately I am one of those people who cant seem to catch a break during the winter. I always seem to catch a cold and at least for a week I fin myself fighting to get better. I've used so many products and all of them seem to take forever and a day to work. My question is, does this product do exactly what it claims to do? Also, how long does it take to start working? Its very hard to spend money for things that ultimately fail at the task at hand.