Magnesium has many roles within the body including the health of nerve endings and fibres, and a lack of magnesium may show in a horse as tension or nervousness. Magnitude is a highly absorbable form of Magnesium that should be fed daily to horses or ponies to promote healthy nerve tissue and reduce nervous tension.

For very young, excitable or overzealous horses, requiring focus, increased concentration and calming, a product from the So-Kalm Plus Range will be more suitable. So-Kalm Plus Paste may also be used as a pre-competition addition alongside Magnitude.