By reducing sugar intake from carbs, we can significantly decrease insulin secretion after each meal. Even though proteins also raise insulin spikes, the effect is not as high as carbs, as proteins are digested at a much lower rate than carbs. Healthy fats have the lowest impact on insulin spikes. Therefore, I prefer consuming healthy fats to carbs for calories as an energy source. I know some people are more tolerant of carbs metabolism, so choosing fat or carbs is an individual matter based on advice from qualified dieticians.