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 h English (en)==History==
Hypoglycemia was first discovered by [[James Collip]] when he was working with [[Frederick Banting]] on purifying insulin in 1922. Collip was asked to develop an assay to measure the activity of insulin. He first injected insulin into a rabbit, and then measured the reduction in blood-glucose levels. Measuring blood glucose was a time-consuming step. Collip observed that if he injected rabbits with a too large a dose of insulin, the rabbits began convulsing, went into a coma, and then died. This observation simplified his assay. He defined one unit of insulin as the amount necessary to induce this convulsing hypoglycemic reaction in a rabbit. Collip later found he could save money, and rabbits, by injecting them with glucose once they were convulsing.