Low blood sugar

Is this low blood sugar?

Hypoglycemia means blood glucose has fallen too low. For many people with diabetes, the alert level is below 70 mg/dL, though individual targets differ. A measurement helps distinguish a low from symptoms alone. 1

Why can it feel sudden?

Sweating, shaking, hunger, a racing pulse and difficulty concentrating are possible signs. Symptoms vary, and a severe episode can cause unconsciousness. IQWiG emphasizes responding promptly rather than waiting for every sign to appear. 2

What brings on a low?

Insulin and certain diabetes medicines can cause hypoglycemia. Too little carbohydrate, delayed meals, extra activity or alcohol without enough food can upset the balance between medication and available glucose. Repeated episodes call for a review of the diabetes care plan. 1

When is it an emergency?

An unconscious person cannot swallow safely: food or drink must not be given by mouth. Severe episodes require emergency help; prescribed glucagon may be used according to the person’s emergency plan. 3

Do blood-sugar supplements answer this problem?

Research on supplements such as chromium, cinnamon and berberine mainly asks whether they improve high blood sugar in type 2 diabetes. NCCIH finds the evidence limited and inconsistent. That research does not establish a treatment for an acute low. 4

What takes priority?

For a conscious person able to swallow, standard low-glucose care uses fast-acting carbohydrate and repeat glucose checks. Prevention centers on matching meals, activity and medicines, with the care team adjusting the plan when needed. 1

Questions people ask