by Suman
(Kalol, Gujarat, India)
QUESTION: My fasting blood sugar was 107.4 mg/dL and my post-meal blood sugar was 126 mg/dL. Are these results normal, abnormal, or something to worry about?
A fasting laboratory glucose of 107.4 mg/dL is mildly elevated and falls in the prediabetes range of 100–125 mg/dL. It does not diagnose diabetes. A post-meal result of 126 mg/dL is generally reassuring, but its meaning depends on when and how it was measured. Repeat fasting glucose and an HbA1c can show whether the mild elevation is persistent.
Answer by Dr. Albana Greca, MD, MMedSc
Hi Suman,
There is no reason to panic, but the fasting result should not be described as completely normal. Standard diagnostic thresholds are more useful than a laboratory reference range that may list a slightly different upper limit.
For a nonpregnant adult, laboratory fasting plasma glucose is generally interpreted as:
Fasting means no food or caloric drinks for at least eight hours. A result of 107.4 mg/dL is therefore mildly elevated, but one test alone does not establish a diagnosis. Our guide to normal fasting blood sugar ranges explains these thresholds.
PPBS means post-prandial blood sugar. If 126 mg/dL was measured about two hours after an ordinary meal, it is generally reassuring. However, an ordinary meal test is not used by itself to diagnose or exclude diabetes because the meal size and carbohydrate content vary.
If 126 mg/dL was the two-hour laboratory result during a formal 75-gram oral glucose tolerance test, it is below the prediabetes cutoff of 140 mg/dL. If you already have diabetes, 126 mg/dL is also below the common post-meal target of 180 mg/dL for many adults. Read more about blood sugar after eating.
Ask your clinician whether to repeat the fasting plasma glucose and obtain an HbA1c. HbA1c reflects average glucose over approximately the previous two to three months. A result below 5.7% is generally normal, 5.7–6.4% is in the prediabetes range, and 6.5% or higher may indicate diabetes when confirmed.
Testing is especially useful if you have overweight, a family history of diabetes, high blood pressure, abnormal cholesterol, previous gestational diabetes, or symptoms such as excessive thirst, frequent urination, blurred vision, or unexplained weight loss. Our overview of tests for diabetes and prediabetes explains how results are confirmed.
Do not automatically add a bedtime snack. A snack may raise overnight glucose and is usually needed only for a specific reason, such as preventing a documented medication-related low.
Contact a clinician promptly if fasting laboratory glucose repeatedly reaches 126 mg/dL or higher or if symptoms of high glucose develop. Seek urgent care for persistent readings around 300 mg/dL or higher with dehydration or illness, and emergency care for vomiting, difficult breathing, confusion, fainting, glucose above 400 mg/dL, or a meter displaying “HI.”
Your post-meal result is reassuring, while the fasting result is only mildly elevated. Confirm the pattern with HbA1c or repeat fasting laboratory glucose rather than worrying about one test or trying unneeded supplements. Early lifestyle changes can reduce the risk of progression if prediabetes is confirmed.
Educational safety note: This answer is for general diabetes education only. It does not replace personal medical advice, diagnosis, or treatment. Do not start, stop, or change medicines, supplements, diet, or exercise plans without speaking with your healthcare provider.
Last reviewed: July 2026.
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