One 100 g serving of beef, flank, steak, separable lean and fat, trimmed to 0" fat, select, raw has 145 calories, 0 g of carbs, and 0 g of fiber.
Full macro and micronutrient breakdown, plus how this compares across diets, is on the Beef, flank, steak, separable lean and fat, trimmed to 0" fat, select, raw nutrition facts page.