More Important - Fewer Calories Or Less Fat? - as part of the expert series by GeoBeats. In order for successful weight loss, it is more important to follow a lower calorie diet than it is to watch your fat intake and follow a lower fat diet. Just because something is low fat, does not necessarily mean that it is low calorie, so you do not always want to go by the fat content on a food. There are all different type of fat, as well. There are healthy fats such as the fats found in olive oil, peanut butter, and avocados. So, those are fats that you would not want to get rid of and choose lower fat versions of those foods. In order to create weight loss, you need an energy deficit, which means you would need to eat less calories in order to lose weight. So, in general, when you are trying to watch your weight, it is better off to eat smaller portions, cut back on the calories, choose lower calorie options, than it is to track the fat grams of every single thing that you eat. In general, also, low fat does not necessarily mean that it is better for you. Usually, low fat products are higher in carbohydrates and higher in sugar and tend to have a lot of preservatives in them. So you definitely want to make sure that you are choosing healthier options as opposed to what is labeled low fat.