By feeding patients increasingly macabre concoctions—half a pound of chicken liver, half-cooked hamburgers, raw hog stomach, and even once the regurgitated gastric juices of one of his students (spiced up with butter, lemon, and parsley)—Minot and his team of researchers conclusively demonstrated in 1926 that pernicious anemia was caused by the lack of a critical micronutrient, a single molecule later identified as vitamin B12.
