One goodtoknow user didn't know about this extra 1,000 calories and was amazed by what she discovered after keeping a food diary for a day.
Mother of five, Sally Bartlett, 37, from Lancashire (pictured above) wrote down everything she ate and drank over 24 hours to see how those hidden calories added up.
Sally says: 'I would like to lose a bit of weight but I don't know what I'd eat because I'm quite good already. I'm also quite active because I have a part-time job in a bakery, where I'm on my feet all day. And I've got five kids to run around after, so I don't really know why I'm overweight.'
Follow Sally's food diary and see if you can spot the 1,000 hidden calories and what food swaps we recommend. Maybe you're making the same mistakes too...