Our bodies will first burn sugar to supply energy to our cells; for that reason, we must lower our blood sugar enough to switch the body to fat burning. That process is known as ketosis. - What we should avoid! We need to avoid as many carbohydrates as possible in our food intake. Proteins can convert to sugar, and too much protein can irritate and affect the liver, preventing it from burning fat. "Insulin is the principal hormone that acts like a switch directing our bodies