4 Effects of Eating a Low Fat Diet

2. What is an “Ultra” Low-Fat Diet?

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An ultra low-fat, or very low-fat diet, is a diet that contains 10% or less calories from fat. It also tends to be low in protein (10%) and very high in carbs (80%).

Ultra low-fat diets are mostly plant-based. They limit the intake of animal products, such as eggs, meat and full-fat dairy (6).

They also tend to limit high-fat plant foods that are generally perceived as healthy, including extra virgin olive oil, nuts and avocados.

This can be problematic, because fat serves several important functions in the body.

It is a major source of calories, helps build cell membranes and hormones, and helps the body absorb fat-soluble vitamins like vitamins A, D, E and K.

Additionally, fat makes food taste good. A diet that is very low in fat is not as pleasurable as a diet that is moderate or high in fat.

All that being said, studies show that an ultra low-fat diet can have very impressive benefits against several serious diseases.

Bottom Line: An ultra low-fat (very low-fat) diet provides less than 10% of calories from fat. It limits the intake of most animal foods and even eliminates healthy higher-fat plant foods like nuts and avocados.