What is the intake of carbohydrate to be considered as a low-carbon diet? There is no completely unified standard in the world. According to foreign research, the intake of low-carbon dietary carbohydrates (CHO) is lower than the standard stipulated by the American Dietary Guidelines (DGA), accounting for 45% ~ 65% of the total intake. Below this standard, it is divided into several categories:

(1) Very low carbohydrate, CHO accounts for <10% of total energy, or 20 ~ 50g/d. (i.e. ketogenic diet)

(2) Low carbohydrate, CHO accounts for less than 26% of the total energy, or <150g/d.. (that is, low-carbon diet), which is not ketogenic.

(3) CHO accounts for 26% ~ 44% of total carbohydrate.

However, the health guidance value of this classification standard is very limited. In addition to carbohydrates, protein and fat should be ingested. How much nutrition ratio is beneficial to health? For this reason, many studies have been conducted at home and abroad, resulting in various recommended diets with different proportions in protein.

For example, Atkins diet, Bantingdiet, Paleo diet, South Beach Diet, Mediterranean diet, etc., but no matter what kind of diet, their similarities are that they emphasize the consumption of unprocessed and "natural" foods such as non-starch vegetables and appropriate berries, and suggest reducing or not eating refined grains and berries.