My husband brought home a sample roll of this he picked up at Ride your bike to work day. It sat in our cabinet until my daughter started preschool. Then everyone started getting sick. I popped one of these the day I felt symptoms coming on and I was immediately well. No symptoms at all. I stopped taking them and the symptoms returned. Popped another one and again...cold symptoms ceased. Everyone got a cold in my house but me. Which is hilarious since I am usually the first one to get what is going around and the last one to get over it. This stuff rocks! Now we fight over them. I'm stocking up!