Feasibility Study of the Effect of Intra-Dermal Insulin Injection on Blood Glucose Levels After Eating

This study is to determine the effect of intra-dermal (ID) administration of regular and of rapid-acting insulin, before eating, on blood glucose levels for several hours after a standard meal (a mixed, liquid meal). Insulin will also be given normally, subcutaneously, for control or comparison purposes. The hypothesis or expectation is that ID insulin will work more quickly and control blood glucose levels better than SC injection.