Is it possible?
I just found an interesting link:
Did milk thistle do something to me? - WrongDiagnosis.com
In brief, people felt right rib/ right upper stomach slightly sore after taking milk thistle, some people got a feeling which is like eating too much, but the feeling only comes from right side. Some people think it's just mental. But seems that more than one person got this effect from more than one brand of milk thistle, and some of them didn't even believe this will happen.
why I post this? because it just match my feeling after taking milk thistle.... The feeling is a bit like flatulence, but there is no real gas and the location is on right upper stomach. Very mild, but enough to be felt.
I am not saying Milk thistle is bad, maybe it's also a sign that it works (?). I am just curious, have you guys also felt this?