Great!!! Although I did not know the brand, I bought the product, along with other supplements, since I had read about the advantages of purchasing the supplements that make up the ZMA separately. After several searches, I found the brand Doctor's Best, I did not regret it, because this brand is not behind the best known. The packaging of the product is a bit polluted, could be simpler. The advantage of this type of supplement is the high absorption, I felt a better result than supplements of other brands, so I recommend !!!