There's plenty of room on the Food Diary for a Fiber column. Being able to calculate Net Carbs is very important. Fiber prevents spikes in blood sugar, helps you feel full longer and promotes healthier bowel movements. All nutrition labels show the fiber count. Tallying only Carbohydrates just isn't all that important to your overall health.
As for how to spell it, that's a challenge. Some users are British and spell it Fibre. I'd guess more use the American spelling, Fiber.
