I had a US meal replacement bar this morning (the chocolate crispy one) and I was starving two hours later! My stomach was really grumbling, whereas if I have a shake, I'm never really grumbling, I'm just peckish by lunch time. I'm thinking it could be because it was the first time I'd had a bar, but I thought they'd be more filling than the shake. If this is going to persist, I'll have to stick to the shakes, cos it's so embarrassing when I'm working and my stomach is grumbling really loud! Lol. Does anyone else find the bars to be not very filling?