★ 55% OFF for Bookstores! NOW at $ 31.97 instead of $ 41.97! LAST DAYS! ★ The Sirtfood Diet works by blocking fat production in cells by inhibiting an enzyme called Citrate Lyase. When this enzyme is inhibited, fat can no longer be produced. You will still be able to eat carbohydrates and proteins, but it will not affect your ability to burn fat off your body. If you are consuming sufficient amounts...