Hypoglycemia in People Who Do Not Have Diabetes: Reactive Hypoglycemia

In reactive hypoglycemia, symptoms appear within 4 hours after you eat a meal.

Diagnosis
To diagnose reactive hypoglycemia, your doctor may

• ask you about signs and symptoms
• test your blood glucose while you are having symptoms (The doctor will take a blood sample from your arm and send it to a laboratory for analysis. A personal blood glucose monitor cannot be used to diagnose reactive hypoglycemia.)
• check to see whether your symptoms ease after your blood glucose returns to 70 or above (after eating or drinking)

A blood glucose level of less than 70 mg/dL at the time of symptoms and relief after eating will confirm the diagnosis.

The oral glucose tolerance test is no longer used to diagnose hypoglycemia; experts now know that the test can actually trigger hypoglycemic symptoms.

Causes and Treatment
The causes of most cases of reactive hypoglycemia are still open to debate. Some researchers suggest that certain people may be more sensitive to the body's normal release of the hormone epinephrine, which causes many of the symptoms of hypoglycemia. Others believe that deficiencies in glucagon secretion might lead to hypoglycemia.

A few causes of reactive hypoglycemia are certain, but they are uncommon. Gastric (stomach) surgery, for instance, can cause hypoglycemia because of the rapid passage of food into the small intestine. Also, rare enzyme deficiencies diagnosed early in life, such as hereditary fructose intolerance, may cause reactive hypoglycemia.

To relieve reactive hypoglycemia, some health professionals recommend taking the following steps:

• eat small meals and snacks about every 3 hours
• exercise regularly
• eat a variety of foods, including meat, poultry, fish, or nonmeat sources of protein; starchy foods such as whole-grain bread, rice, and potatoes; fruits; vegetables; and dairy products
• choose high-fiber foods
• avoid or limit foods high in sugar, especially on an empty stomach

Your doctor can refer you to a registered dietitian for personalized meal planning advice. Although some health professionals recommend a diet high in protein and low in carbohydrates, studies have not proven the effectiveness of this kind of diet for reactive hypoglycemia.

source: http://diabetes.niddk.nih.gov/dm/pubs/hypoglycemia/index.htm