10 Best Ways To Lose Weight That Actually Work

6. Volumetrics Diet

Barbara Rolls, a nutrition professor at Penn State University, developed the Volumetrics diet, which encourages people to eat a lot of nutrient-dense foods that are low in calories and high in water to help them lose weight.

It divides foods into four categories based on their caloric density. Foods in category one are meant to be consumed the most, while those in category four are to be strictly limited. On the other hand, portion control is important for foods that fall in between.