Swisse Magnesium for the Muscles Swisse Magnesium is a dietary supplement that consists of magnesium and vitamin B6. The Magnesium in Swiss UltiplusMagnesium Muscles comes from magnesium citrate. Magnesium citrate, an easily absorbable form of magnesium. In addition to supporting muscle function, it together with vitamin B6 ensures the functioning of the nervous system. In addition, they help reduce fatigue. * contains magnesium citrate, an easily absorbable form of magnesium * with vitamin B6 that increases the absorption of magnesium in the cell.