have you read the sticky at the top of the page,so you're thinking of starting atkins and I think on the low carb forum there is one about net carbs.
This is mainly for in the states where they include the fibre in the carb count on the packet and you deduct it from the total to get the net carbs,these are the ones that are absorbed and affect your blood sugar.
Over here you just need to count the carbs on the packet because the fibre is already deducted.
Hope this helps,good luck.
lorna x