Net Carbs
Definition
Total carbohydrates minus fiber and sugar alcohols, representing the carbohydrate content that directly impacts blood glucose levels. Net carbs are used in low-carb and ketogenic dietary approaches to estimate glycemic impact more accurately than total carbohydrates. CGM studies have shown that foods with the same net carb count can produce different glucose responses depending on fiber type, food matrix, and individual gut microbiome composition.
Why “Net Carbs” Matters for Glucose Monitoring
Understanding net carbs is essential for anyone using or evaluating a continuous glucose monitor. This concept directly affects how CGM devices are designed, how glucose data is interpreted, and how clinical decisions about blood sugar management are made.
This term applies broadly across all continuous glucose monitors and is foundational knowledge for interpreting CGM data, whether you are managing diabetes or using a sensor for metabolic wellness.
Related Terms
A metric that accounts for both the quality and quantity of carbohydrates in a food serving, calculated as GI multiplied by grams of carbohydrates per serving divided by 100.
A 0-to-100 scale that ranks carbohydrate-containing foods by how quickly they raise blood glucose compared to pure glucose (GI = 100).
The three categories of nutrients that provide calories and energy: carbohydrates (4 cal/g), proteins (4 cal/g), and fats (9 cal/g).
A type of starch that resists digestion in the small intestine and passes to the large intestine intact, where it functions like soluble fiber and is fermented by gut bacteria into beneficial short-chain fatty acids.