I went to our work cafeteria and got about a cup of tuna salad..
Thinking that if its just tuna and mayo then Im okay..
and thats all I think was in there..

I entered it to fitday.. (first day using it)
and 1 cup of tunasalad has 20g of carbs??

If I make it at home, one can of tuna plus one or so tbls of mayo CAN NOT BE 20 grams..

Is that right??
How do i know..

Im guessing on the one cup thing but it was one cup or under so I was over estimating..

I just wanted to see how much I was actually consuming..