Eating fat leads to weight gain
The idea that consuming foods high in fat will make you gain weight is a widespread diet myth. While it is true that eating too much of any macronutrient, including fat, can cause weight gain, eating foods high in fat as part of a balanced, healthy diet will not cause weight gain.
On the other hand, eating foods high in fat may help you lose weight and feel full between meals. In fact, a number of studies have suggested that eating foods high in fat, such as whole eggs, avocados, nuts, and full-fat dairy products, may help in weight loss and feelings of fullness. Additionally, studies have shown that extremely high-fat diets, such as ketogenic and low-carb, high-fat diets, can help people lose weight. Quality obviously important. Consuming highly processed, high-fat foods including fast food, sugary baked goods, and fried foods may make you more likely to gain weight.