Magnesium is very important for maintaining good muscle and nerve function and for the heart and blood vessels. Together with calcium and phosphorus, magnesium is one of the most important building blocks for strong bones. A magnesium deficiency can lead to muscle cramps and, in the long term, to weaker bones. A magnesium supplement can have a calming effect on tense and nervous horses. RS Mustang® Magnesium is an easily absorbed magnesium supplement for horses with low levels of magnesium in their feed. It has a high phosphorus content, which is also important for horses. A magnesium supplement can be particularly beneficial for horses in hard work and in the case of diarrhoea or heavy sweating. Dosage: Adult horse 10–20 g/day. Mix in the feed – a 10 g scoop is provided About 100 days' supply for one horse 1 kg