I drank a lot of all natural lemonade and limeade the first two weeks after sleeve surgery, its all I could drink pretty much diluted with Water outside my Protein shakes.. I was fine and I think it helped my stomach heal and gave me energy .. Now over three weeks out I drink a little here and there..Sugar Free drinks make me sick just thinking about them.. And I can afford the calories no problem ..
For me and and my nutritionist approved plan its all about getting my nutrition and protein in and watching my calories.. But no problems with acidic drinks luckily!