US Medical Term · tests
Fasting Blood Glucose
Glucosa en ayunas
In 9 languages
| Language | Term |
|---|---|
| English | Fasting Blood Glucose |
| Spanish (Español) | Glucosa en ayunas |
| Chinese (中文) | 空腹血糖 |
| Korean (한국어) | 공복혈당 |
| Vietnamese (Tiếng Việt) | Xét nghiệm đường huyết lúc đói |
| Filipino (Tagalog) | Fasting Blood Glucose |
| Portuguese (Português) | Glicemia em jejum |
| Thai (ภาษาไทย) | การตรวจน้ำตาลในเลือดขณะอดอาหาร |
| Japanese (日本語) | 空腹時血糖 |
What it means
A fasting blood glucose test measures the amount of sugar (glucose) in your blood after you have not eaten for at least eight hours. Glucose provides energy to every cell, but chronically high levels damage blood vessels and nerves. A nurse or technician draws blood from a vein in your arm or uses a finger-prick. A normal result is below 100 mg/dL. A result between 100–125 mg/dL suggests prediabetes, and 126 mg/dL or higher on two separate occasions indicates diabetes. Doctors use this test for routine screening, diabetes diagnosis, and to check how well dietary or medication changes are working.
How to say it
Sentences a patient might use with a doctor, nurse, pharmacist, or insurer:
How many hours do I need to fast before my fasting blood glucose test?
¿Cuántas horas debo ayunar antes de la prueba de glucosa en ayunas?
My fasting blood sugar came back at 118 — am I prediabetic?
Mi glucosa en ayunas salió en 118 — ¿soy prediabético?
Can I drink water before my fasting glucose blood draw?
¿Puedo tomar agua antes de la extracción de sangre para la glucosa en ayunas?
Where you'll see it
Related terms
Sources
Last reviewed: September 2026