Eating mostly fats and very few carbs for 3 months helps overweight people lose fat and weight, on average about 5% body fat and 3.5 kg.

Combining keto diet with skipping meals two days a week helps overweight people lose more fat and weight than doing either one alone.

When obese women follow a very low-carb, high-fat diet (ketogenic), they lose more belly fat and keep more muscle than when they just eat fewer calories.

When adults follow a ketogenic diet, they tend to lose weight - about 2.5 kg on average compared to other diets, according to research combining 27 studies.

If you eat the same number of calories no matter what diet you're on, cutting carbs might help you lose weight fast, but after a while, you'll lose about the same amount as someone eating more carbs.

If you're an adult with mild type 2 diabetes, switching to a keto diet for 12 weeks might lower a fat in your blood linked to liver fat, more than a low-fat diet would.