Normally, I am very skeptical of products like this. I am very scientific minded, and I have read all the research that says zinc cold-control products have nothing more than a placebo effect. However, my fiancé and I have always been regular users of Zicam and I have to say, I don't care if it's a placebo effect or not -- it WORKS. It doesn't keep us from getting sick, but it helps us feel much better throughout our illness and shortens the period of sickness. Zicam also tends to cost a bit less than comparable products. As a BzzAgent member, I am sometimes sent samples of products to try, and I was recently sent Zicam samples. However, I didn't need the samples to get me on the boat! I have always loved Zicam, and I plan to continue using it every time I feel myself start to get sick.