What Blood Sugar Level is Considered High?

Understanding blood sugar levels is essential for maintaining good health, especially for those at risk of diabetes. For a healthy individual, the standard fasting blood sugar level typically ranges between 3.6 and 6.1 mmol/L. Two hours after eating, blood glucose should ideally remain below 7.8 mmol/L. When levels exceed these thresholds, it may indicate hyperglycemia or high blood sugar.

Defining High Blood Sugar

Hyperglycemia occurs when the body fails to regulate blood glucose effectively. If your fasting blood sugar consistently measures above 6.1 mmol/L and your post-meal (two-hour) glucose level exceeds 7.8 mmol/L, this may be classified as high blood sugar. These elevated readings suggest that your body is struggling to maintain normal glucose metabolism.

Diagnosing Diabetes

If your fasting blood glucose is higher than 7.0 mmol/L or your two-hour post-meal reading surpasses 11.1 mmol/L, it could signal diabetes. These levels are significantly above the normal range and usually require further testing and medical evaluation to confirm a diagnosis.

Intermediate Conditions

There are also intermediate stages that serve as warning signs. A fasting blood sugar level between 6.1 and 7.0 mmol/L is considered impaired fasting glucose. Similarly, a two-hour post-meal glucose level between 7.8 and 11.1 mmol/L indicates impaired glucose tolerance. Both of these conditions are early indicators of potential diabetes and should not be ignored.

Why It Matters

Recognizing high blood sugar early can help prevent serious complications such as heart disease, kidney damage, and nerve problems. Regular monitoring and lifestyle adjustments—like improving diet, increasing physical activity, and managing stress—can make a significant difference in maintaining healthy glucose levels.

If you're concerned about your blood sugar levels, consult with a healthcare professional to determine the best course of action. Early detection and management are key to avoiding long-term health issues related to hyperglycemia.