According to the card, the magnesium in the composition is in the form of magnesium carbonate; two tablets contain 120 mg of magnesium (32% of the daily value) and 1.4 mg of vitamin B6 (100%). The manufacturer writes that magnesium helps the function of the muscles and the nervous system and that vitamin B6 helps to reduce tiredness. The card gives no comparison of magnesium carbonate with other forms.
General information (not a manufacturer's instruction): if the stomach is sensitive, it is better to consult a doctor or a pharmacist before taking magnesium supplements.