Understanding Mean Plasma Glucose: Normal vs Optimal Ranges

?What is Mean Plasma Glucose?

Mean plasma glucose (or estimated average glucose, eAG) is a calculated measure that converts HbA1c into an estimated average blood glucose over 3 months, using the formula: eAG = (28.7 × HbA1c) − 46.7. It makes HbA1c results easier to understand in familiar glucose units.

!Why It Matters

eAG helps patients understand what their HbA1c means in terms of daily blood sugar levels. An HbA1c of 5.7% corresponds to an eAG of about 117 mg/dL; an HbA1c of 7.0% (the diabetes treatment target) corresponds to eAG of 154 mg/dL. It bridges the gap between laboratory values and continuous glucose monitoring readings.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• No specific symptoms — reflects HbA1c which reflects average glucose

How to Improve Your Levels

• 1Reduce refined carbohydrates and added sugars, the biggest drivers of average glucose
• 2Walk for 10–20 minutes after meals to blunt post-meal glucose spikes
• 3Exercise regularly — both aerobic and resistance training lower average glucose
• 4Prioritise sleep and manage stress, which raise glucose via cortisol
• 5Lose excess visceral fat to improve insulin sensitivity

When to Test

Calculated from HbA1c — no separate test needed.

Related Biomarkers