Aiyoh, maltofer memang boleh buat perut jadi uncomfortable macam tu, terutama kalau diminum on empty stomach! A few of my mum friends yang ambil iron supplement cakap the same thing, heartburn dan bloating macam x lepas. Coba take it with food or after meals, dan minum plenty of water throughout the day. Tapi kalau it persists or getting worse, better check with your doctor lah, especially if you're pregnant or breastfeeding, sebab ada other iron options yang might work better for your tummy.