insulin insulin insulina insulin insulin insulin insulin insulin Insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin Insulin Insulin insulin insulin insulin insulin purpose of insulin insulin insulin insulin insulin 胰島素 insulin insulin insulin Insulin insulin insulin insulin sugar insulin insulin Insulin insulin insulin insulin What is insulin? insulin 胰島素 insulin insulin Insulin’s insulin Insulin is a hormone insulin insulin insulin инсулину insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin What is Insulin? insulin insulin Insulin is a hormone insulin insulin What is Insulin? insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin insulin