i am exactly the same...my stomach is flat in morn...if i eat a little say 2 small meals in the day i will notice i am bloated usually toward end of day,,,i cannot understand it at all....doctors only tell me to eat less and introduce more fibre ..blah blah blah they dont have a clue....i eat in typical day..breakfast...cup coffee and banana,
lunch...brown bread samwhich with salad,,
dinner...bowl of all bran or bran flakes witjh skimmed milk...............
how am i fat? how can i not go to the toilet everyday like normal people? why am i bloated even after a samwhich ? its very frustating.....good luck to you ...u are not alone......oh by the way i think activia is a complee waste of money.......