Pregnancy cravings are normal, but indulging unusual cravings when pregnant can sometimes be dangerous. Case in point: A woman who consumed a 1-pound box of baking soda a day, both before and during her pregnancy, developed serious muscle and heart conditions, according to a report published in the journal Obstetrics and Gynecology in August 2013. What caused the woman to crave an ingredient most commonly found (in very small quantities) in baked goods? The doctors who diagnosed her believe it was a condition known as pica, which is common during pregnancyand is characterized by cravings for nonfood items, such as baking powder, clay or dirt. Baking soda is mostly made up of sodium bicarbonate which, when consumed in large quantities, can disturb the body's normal metabolic processes. In the case of the mother-to-be, downing such a large quantity of baking soda resulted in weakening of the heart and other muscles. Luckily, doctors were able to induce labor and the woman delivered a healthy baby.