There are many low calorie sugar substitutes nowadays, but erythritol seems to be one of the most popular.
Erythritol is a sugar alcohol, produced industrially by fermentation of the starch from corn to generate glucose. Glucose is then fermented with a fungus to produce the alcohol erythritol.
Even though sugar alcohols are technically carbohydrates, we do not completely absorb them, most of these do not raise blood sugar levels and therefore don’t count as “net” carbs.
Because this sweetener has no impact on blood glucose and insulin, it is recommended for insulin resistance and diabetes diets that focus on reducing carbohydrate consumption. It is 60 to 80 percent as sweet as sugar so you may need to use a bit more than your regular amount of sugar when first transitioning.
Erythritol is O calories, has 5 gr carbs of which 5 gr are polyols, 0 gr of fat and 5 gr of protein. This translates to 0 net carbs.
Erythitol can be used in hot or cold preparations, and come in many presentations like granular or powder.