Three Cups of Morning Coffee at the Oakhaven Diner Changed Everything

stethoscope hanging from a brass hook on the wall. “What kind of test?”

“A simple protocol,” Ben said. “You take your reading first thing in the morning, before you have anything to drink, while your body is still completely quiet.”

“Then you drink exactly one cup of regular coffee from that tin you hid. Wait twenty minutes, and take continue reading …