Insulin sensitivity refers to how much insulin your body needs to release in order to move glucose out of the bloodstream and into the cells. You are considered insulin sensitive if your body only need to secrete a small amount of insulin to move glucose into the cells. The more insulin sensitive you are, the better your body utilizes carbohydrates for energy. Having good insulin sensitivity is typically a marker of good health and is often improved when you follow a Ketogenic Diet.
Research has linked insulin sensitivity to a lower body fat percentage. While some factors determining insulin sensitivity are predetermined by your genetics, age, and ethnicity. Other factors can be altered to positively affect your insulin sensitivity such as improving your stress levels, getting more quality sleep, losing weight, increasing your exercise, and eating fewer carbohydrates.