I've read a lot online about the benefits of kefir and IBS but a lot of info seems to be related to IBS-D. Has anyone tried it for IBS-C? If so did it help and how much did you drink? I'm at the start of a rather painful flare up and willing to try anything that may help. I did buy some kefir but not sure if it'll help or hinder and how much to drink of it.