Better Than Before: What I Learned About Making and Breaking Habits--to Sleep More, Quit Sugar, Procrastinate Less, and Generally Build a Happier Life

by Gretchen Rubin

what causes a body’s insulin level to be high or low? For the most part, diet. The more carbohydrates a person eats, and the easier these carbohydrates are to metabolize, the more insulin in the blood, and the more fat that accumulates.