A wide variety of life-threatening diseases can cause jaundice in Adults. It's the main sign of a problem with the liver, gallbladder, or pancreas that often causes high bilirubin levels in the body. Normal bilirubin level ranges between 0.3 and 1.0 milligrams per deciliter (mg/dL). If you suspect anything, Book your test with Afriglobal now and get the proper treatment for your condition.