I don't use chia seed but I do use Flaxseed (milled/ground). I sprinkle it on my food at least once a day, every day. Two or three pinches. It is full of essential Omega 3 and provides me with plenty of fibre because I am not a vegetable lover and I don't eat fruit.
I have also found some lovely bread. It is my local supermarket's own brand (Booths) and is labelled as their low GI seeded bread, but each slice is only 8g carbs and they are lovely thick big slices just right for toasting. It is well worth searching all your local supermarkets for bread and looking at the carb amounts per slice. You never know what you may find.