I'm almost afraid to write this as every time I need to restock my supply, it is "out of stock" but for those of us who actually listen to our bodies, know what we need and when we need it, a product like this zinc acetate is a welcome addition to our cabinet. I have long been of the opinion that if we listen closely to our bodies, we can know from various symptoms what is coming, and this zinc is the ultimate uppercut punch to any upper respiratory symptoms which appear.