Ketoviante
The FDA has not formally defined the terms "Low-Carb," "Non-Impact Carbs" and "Net Carbs" as it has done with terms relating to fat content in food. That will surely come, but in the meantime many foods that are not particularly low-carb can get away with labeling themselves low-carb. As always, reading the nutritional information on the package and noting serving sizes is your best protection.
