What matters more calories or fats and sugars?

A combination is key: Cutting out sugar and starch is important due to the carbohydrates causing weight gain. Eating carbohydrates leads to the release of the fat-storage hormone insulin, which acts to remove nutrients from the bloodstream and store it as fat. However, managing cal. Is also important. Weight loss occurs when your caloric expenditure exceeds your caloric intake so be active and aware of cal. Consumption.