For people who have stomach surgery to remove part of the stomach or who dumps most of the meal into the small intestine immediately, there is a very rapid absorption of the carbohydrate. This rapid carbohydrate absorption can be followed by a very brisk insulin release. The big insulin release can drive the glucose level very low. Of all the causes of reactive hypoglycemia, this can be the most dangerous. Alimentary hypoglycemia has been reported to cause coma and seizures.
Alcohol can cause an excessive release of insulin when taken with carbohydrate.
The excess insulin can lead to you know what. The most common scenerio is when drinking alcohol and carbohydrate alone. So if reactive hypoglycemia is your problem, cut out the alcohol. The final type of reactive hypoglycemia is ideopathic, in other words we don't know the cause. The postprandial syndrome is not true hypoglycemia, but you may feel better with the same diet that works for people with reactive hypoglycemia.