Johnson & Johnson (JNJ) has turned one of diabetes’ most worrisome warning signs into a treatment that lowers dangerously high levels of blood-sugar before the disease can cause blindness, kidney damage and heart disease. The demand for novel diabetes drugs is soaring as rising obesity rates push the condition to epidemic levels, affecting nearly 347 million people worldwide. While 10 different types of drugs are sold to treat diabetes, physicians still struggle to control their patients’ blood-sugar levels.