A normal blood glucose level for a person without diabetes when fasting (not eating for at least 8 hours) is generally between 70 and 99 mg/dL (3.9 to 5.5 mmol/L). After eating, blood glucose levels may rise temporarily but should usually stay below 140 mg/dL (7.8 mmol/L) two hours after a meal. For reference:
- Normal fasting glucose: 70 to 99 mg/dL (3.9 to 5.5 mmol/L)
- Normal post-meal (2 hours after eating): Less than 140 mg/dL (7.8 mmol/L)
Blood glucose levels less than 70 mg/dL are considered low, and levels consistently higher than the normal range may indicate prediabetes or diabetes. Prediabetes fasting glucose range is typically 100 to 125 mg/dL (5.6 to 6.9 mmol/L), and diabetes fasting glucose is 126 mg/dL (7.0 mmol/L) or higher on more than one occasion. These values are typical for adults and may vary slightly depending on laboratory standards and individual health conditions. Glucose levels are tightly regulated in the body to maintain energy balance. In summary, for a healthy person without diabetes, normal glucose levels are:
- Fasting: 70 to 99 mg/dL (3.9 to 5.5 mmol/L)
- 2 hours after eating: Less than 140 mg/dL (7.8 mmol/L)
These levels help the body function properly without causing symptoms or long- term health issues. If glucose levels are outside these ranges, it is important to consult a healthcare professional for further evaluation.
