Can drinking too much alcohol lead to diabetes?

Yes: Alcoholism can lead to pancreatitis. Pancreatitis can lead to diabetes. Alcohol causes many medical and social problems. In rare cases, it has benefits. Alcoholism can even cause permanent brain damage and blindness by creating vitamin deficiencies.

Yes, sometimes: In very heavy drinkers, damage to the pancreas can occur (pancreatitis), which if it occurs many times can damage the ability of the pancreas to make both Insulin and digestive enzymes. The lack of Insulin can lead to a form of diabetes resembling juvenile or type 1 diabetes. In diabetics, alcohol worsens control in a number of ways, and is also a high calorie "food" - twice the calories of sugar.