Net carbs

Concept in nutrition referring to carbohydrates that are absorbed by the body

Nutrition information of Net carbs

• USDA on Net carbs

Net carbs is a term used in nutrition to describe the amount of carbohydrates that are absorbed by the body and have an impact on blood sugar levels. This concept is particularly relevant for individuals managing their diets, such as those with diabetes or those following a low-carbohydrate diet.

Definition

Net carbs are calculated by subtracting certain types of carbohydrates that do not significantly affect blood sugar levels from the total carbohydrate content of a food. These typically include:

• Dietary fiber: Fiber is a type of carbohydrate that the body cannot digest. It passes through the digestive system largely intact and does not raise blood sugar levels. Therefore, it is subtracted from the total carbohydrate count.

• Sugar alcohols: These are carbohydrates that are partially resistant to digestion. Common sugar alcohols include xylitol, erythritol, and sorbitol. They have a lower impact on blood sugar compared to regular sugars, and some, like erythritol, have no impact at all.

Calculation

The formula for calculating net carbs is:

Net Carbs = Total Carbohydrates - Dietary Fiber - Sugar Alcohols (if applicable)

For example, if a food item contains 20 grams of total carbohydrates, 5 grams of dietary fiber, and 2 grams of sugar alcohols, the net carbs would be:

20g (Total Carbs) - 5g (Fiber) - 2g (Sugar Alcohols) = 13g Net Carbs

Importance in Diets

The concept of net carbs is particularly important in:

• Low-carbohydrate diets: Diets such as the Atkins diet or ketogenic diet focus on reducing carbohydrate intake to promote weight loss and improve metabolic health. By focusing on net carbs, individuals can better manage their carbohydrate intake while still consuming foods that contain fiber and sugar alcohols.

• Diabetes management: For individuals with diabetes, monitoring carbohydrate intake is crucial for maintaining stable blood sugar levels. Understanding net carbs helps in making informed dietary choices that minimize blood sugar spikes.

Controversy and Criticism

The use of net carbs as a dietary guideline is not without controversy. Critics argue that:

• The impact of sugar alcohols on blood sugar can vary between individuals, and not all sugar alcohols have the same effect.
• Some processed foods may use the net carb label to market themselves as healthier options, despite containing other unhealthy ingredients.

Also see

• Carbohydrate counting
• Glycemic index
• Low-carbohydrate diet
• Dietary fiber
• Sugar alcohol