Magnesium % in grams per kilo

In Prime Original and Platinum Pro it’s 0.4%, in Lami Low-Cal it’s 0.5%. It means the percent of whatever is being fed – so, if it was 0.4% of 100g, it would be 0.4g magnesium per 100g, so for your average 500kg horse = 0.4g x 500g = 2g per 500g.