When I was a child, I had a Nanny that was from Trinad. If she didn't have insulin available she would cut a stalk of celery from the inner part about 4 inches long, wash it well, place it in a small glass or jar, fill the glass about 1/3 full with water that had been boiled and let to cool, place it in the refrigerator un-covered. After 3-4 days she says the liquid becomes natural insulin. Take orally.