Short answer · Medically reviewed summary · Last updated: 2026-05-08
GLUT1 deficiency (also known as De Vivo disease) is a rare metabolic disorder with an estimated prevalence of 1 in 24,000 to 1 in 90,000 individuals worldwide. Due to frequent misdiagnosis as epilepsy or other movement disorders, these figures are likely underestimates of the true number of people living with GLUT1 deficiency globally. Is GLUT1 deficiency considered a rare disease? Yes, GLUT1 deficiency is categorized as a rare disease.
What is the prevalence of GLUT1 deficiency?
Prevalence of GLUT1 deficiency: how many people are affected worldwide, differences by sex and region, with sources.
GLUT1 deficiency (also known as De Vivo disease) is a rare metabolic disorder with an estimated prevalence of 1 in 24,000 to 1 in 90,000 individuals worldwide. Due to frequent misdiagnosis as epilepsy or other movement disorders, these figures are likely underestimates of the true number of people living with GLUT1 deficiency globally.
Is GLUT1 deficiency considered a rare disease?
Yes, GLUT1 deficiency is categorized as a rare disease. Because the condition often presents with symptoms that mimic more common neurological disorders, clinicians may overlook it, leading to significant delays in diagnosis. Within the DiseaseMaps.org community, 30 people with GLUT1 deficiency have connected to share their experiences, highlighting the importance of patient-led data in understanding this under-recognized condition.
What do we know about the incidence and demographics of GLUT1 deficiency?
The incidence of GLUT1 deficiency is currently estimated to be approximately 1 in 90,000 live births, though some studies suggest it may be higher. The condition affects males and females equally, with no known predilection for specific ethnic or geographic populations. While it is primarily diagnosed in early childhood, the age of onset can vary significantly, ranging from infancy to late adolescence depending on the severity of the genetic mutation.
Why is accurate prevalence data for GLUT1 deficiency challenging to obtain?
The primary barrier to establishing precise prevalence for GLUT1 deficiency is the wide spectrum of clinical severity. Factors contributing to the diagnostic gap include:
- Symptom overlap: Many patients are initially misdiagnosed with idiopathic epilepsy or cerebral palsy.
- Diagnostic complexity: Standard blood tests do not detect GLUT1 deficiency; it requires specialized lumbar puncture to measure cerebrospinal fluid (CSF) glucose levels.
- Genetic variation: A significant portion of cases are caused by de novo mutations, meaning there is no family history to prompt earlier genetic screening.
Next steps
- Consult a metabolic specialist or pediatric neurologist if you suspect GLUT1 deficiency.
- Request a referral for genetic testing or CSF analysis if symptoms persist despite standard epilepsy treatments.
- Join the DiseaseMaps.org community to connect with other families navigating this diagnosis.
Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment; always consult with a qualified healthcare provider.
References
- Orphanet: GLUT1 deficiency syndrome (ORPHA:137604)
- NIH Genetic and Rare Diseases Information Center (GARD): Glucose transporter type 1 deficiency syndrome
- OMIM (Online Mendelian Inheritance in Man): Solute Carrier Family 2 Member 1 (SLC2A1)
- The International GLUT1 Deficiency Foundation
