The low-carbohydrate diets provided less than 45% of calories from carbohydrates. In 11 studies, the diets reportedly contained at least 26% of calories from carbohydrates. The intervention duration ranged from 2 to 96 weeks.

Low-carbohydrate diets reduced (improved) BMI, HbA1c, triglycerides, and weight more than various higher-carbohydrate diets. The effect size for each outcome was small.

There were no differences between the diets for blood cholesterol, blood pressure, fasting blood glucose, HOMA-IR, or waist circumference.

The effects of a low-carbohydrate diet on cardiometabolic health in NAFLD Original paper