I rarely write reviews, but this magnesium oxide has worked wonders for my guy. He was never really a spooky horse. But over the transition from last winter to spring, he came off of fresh grass pasture in Feb and went back on to lush spring grass in May, and he became nearly unridable during this time. He was looky, spooky and had great difficulty concentrating. We both took a hit on our confidence. From my past experience and knowledge on human physiology, I know magnesium plays a big role in nerve modulation, which helps with both brain function and muscle function. So I decided to trial Mg to give him some extra help (if that's the missing piece). Voila! My guy went back to the happy willing partner that he always had been after getting this product for a short 4 weeks. I played with t...