Will supplement break my fast!

Hi. Currently doing 16/8 IF with pleasing results. My eating window closes at 7:00pm. If I take a Magnesium Glycinate tablet at bedtime will that break my fast? Nothing on the label shows any other ingredients (fillers etc). TIA. via /r/intermittentfasting https://ift.tt/eucCGL2 https://ift.tt/L5rpT1J