I have long wondered whether I should purchase this zinc preparation, then finally decided to do it. My decision I have not regretted it: Since taking these zinc tablets I have greatly reduced skin problems and colds, I am not fallen lately victim. Unfortunately I have very bad experience with all zinc preparations: From ignorance wear with my stomach, about nonexistent effect to broken capsules everything was there. With this product, but here I am more than satisfied: The zinc was mixed with histidine, whereby the zinc intake, as well as the -Verwertbarkeit is greatly improved - and this improvement can be felt also clear! This is the first zinc preparation, in which I was able to record a serious effect. In addition, the preparation was produced in Germany and is therefore subject to strict safety conditions. I'd make up my mind at any time for buying this product and do not regret a single penny, which I have invested here. I would recommend this to anyone!