Hai! Yah, quite a few of us complained about this jugak, calcium carbonate memang boleh cause bloating and gas, especially kalau makan on an empty stomach. Try makan with food (preferably something with a bit of fat), drink plenty of water throughout the day, and maybe split the dose into smaller amounts instead of one big tablet, some of my mum friends swear by taking half in the morning and half at night, so the perut tak kena shock satu kali. Start slow too, biar the body adjust, and if it's still teruk, better check with your doc, they might suggest a different type of calcium (like calcium citrate) which some say is gentler on the tummy.