This product is a good value because there are no added fillers. The powder when added to the feed is “invisible”and my horses get what they need without extras.

Madbarn magnesium is a great product. I feel it helps my horse who can be unsettled and also keeps his feet from splaying out flat. It is also a great value. However, the website and subscription setup is very difficult to use, to change the order in any way (timing, add to it, etc).