For most people without diabetes, normal blood sugar after eating stays below 140 mg/dL (7.8 mmol/L) two hours after a meal, and a normal fasting level is below 100 mg/dL (5.6 mmol/L). Blood sugar naturally rises after you eat and should come back down within a few hours as insulin moves glucose into your cells.
Key takeaways
- Fasting blood sugar under 100 mg/dL (5.6 mmol/L) is normal; 100 to 125 mg/dL suggests prediabetes.
- Two hours after a glucose test drink, under 140 mg/dL is normal and 140 to 199 mg/dL suggests prediabetes.
- For adults with diabetes, the American Diabetes Association target is under 180 mg/dL one to two hours after starting a meal.
- Fiber, protein, smaller carbohydrate portions and a short walk after meals all help soften post-meal spikes.
Blood sugar chart: fasting and after eating
| Measurement | Normal | Prediabetes range | Diabetes range |
|---|---|---|---|
| Fasting (8 to 12 hours, no food) | Under 100 mg/dL (under 5.6 mmol/L) | 100 to 125 mg/dL (5.6 to 6.9 mmol/L) | 126 mg/dL or higher (7.0 mmol/L or higher) |
| 2 hours after a glucose test drink (OGTT) | Under 140 mg/dL (under 7.8 mmol/L) | 140 to 199 mg/dL (7.8 to 11.0 mmol/L) | 200 mg/dL or higher (11.1 mmol/L or higher) |
Sources: Cleveland Clinic fasting blood sugar and glucose tolerance test pages. Lab ranges can vary slightly, so always go by the reference range on your report. Doctors do not diagnose prediabetes or diabetes from a single reading; they repeat the test or order an A1C.
What are the targets if you have diabetes?
According to Cleveland Clinic, the American Diabetes Association suggests these general targets for most non-pregnant adults with diabetes: 80 to 130 mg/dL before a meal and under 180 mg/dL one to two hours after starting a meal. Your own targets may be different, so follow the plan your doctor sets.
Why does blood sugar rise after eating?
When you eat carbohydrates, your body breaks them down into glucose, which enters the bloodstream. The pancreas releases insulin, which helps move that glucose into muscle, liver and fat cells for energy or storage. In people with insulin resistance, this process works less efficiently, so blood sugar stays higher for longer after meals.
How can you keep post-meal blood sugar steady?
- Fill half your plate with non-starchy vegetables such as greens, broccoli, peppers and cauliflower.
- Add protein and healthy fat to meals and snacks; they slow how quickly carbohydrates are absorbed.
- Choose high-fiber carbohydrates such as beans, lentils, oats and whole grains instead of refined starches.
- Watch portion sizes of bread, rice, pasta and sweets.
- Take a 10 to 15 minute walk after meals; working muscles use glucose.
- Limit sugary drinks, which raise blood sugar quickly.
- Sleep 7 to 9 hours and manage stress, both of which affect how your body handles glucose.
Alongside these habits, some people add a botanical formula. Naavudi blood sugar support is a herbal formula with bitter melon, fenugreek and other botanicals that supports healthy glucose metabolism as part of a balanced diet and active lifestyle, registered by Health Canada (NPN 80046735).
When should you check your blood sugar?
If your doctor has asked you to monitor, common times are on waking (fasting), before meals, one to two hours after starting a meal, before and after exercise, and at bedtime. If you do not have diabetes, routine home checks are usually not needed; ask your doctor about an A1C or fasting test at your next checkup, especially if you are over 35, carry extra weight or have a family history of diabetes.
When to get medical help
Contact your doctor if your readings are often above your target. Seek urgent care for very high blood sugar with vomiting, confusion or extreme fatigue, or for low blood sugar (under 70 mg/dL) with shakiness, sweating or confusion that does not improve after eating fast-acting carbohydrates.
Frequently asked questions
Is 160 mg/dL after eating normal?
For someone without diabetes, a reading of 160 mg/dL two hours after eating is higher than typical. One reading is not a diagnosis, but it is worth discussing with your doctor.
How long after eating does blood sugar return to normal?
In people without diabetes, blood sugar usually peaks within about an hour of eating and returns close to its baseline within two to three hours.
Should I check one or two hours after eating?
The ADA target for people with diabetes refers to one to two hours after starting a meal. Check at the time your doctor recommends so your readings can be compared.
Sources
- Cleveland Clinic: Fasting Blood Sugar
- Cleveland Clinic: Glucose Tolerance Test
- Cleveland Clinic: Blood Sugar Monitoring
Limited offer
Buy 2 bottles of Naavudi, get 1 free. Three bottles for $159.90. Ships with tracking.
This article is general information, not medical advice. Keep taking any prescribed medication and talk to your doctor or pharmacist before starting a supplement, especially if you take medication that lowers blood sugar. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.