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Real members of DiabetesTeam have posted questions and answers that support our community guidelines, and should not be taken as medical advice. Looking for the latest medically reviewed content by doctors and experts? Visit our resource section.

Glucose numbers after meals

A DiabetesTeam Member asked a question 💭
Baltimore, MD

What should Glucose numbers be after meals in 15 minute intervals up to the 2 hour range. I know that at 2 hours it should be below 180. Is numbers in the mid 200 15 minutes and 30 minutes to one hour after eating is too high?

July 25, 2023
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Answer Summary

Members discussed optimal glucose levels at various intervals after eating, with many agreeing that the standard two-hour post-meal check... Read more

Members discussed optimal glucose levels at various intervals after eating, with many agreeing that the standard two-hour post-meal check (aiming for below 180 mg/dL) is most commonly used, though one member shared detailed normal ranges from glucose tolerance testing showing targets of under 180 at one hour, under 155 at two hours, and under 140 at three hours. Several members expressed confusion about why a diabetes educator requested 15-minute interval testing, which most felt was unnecessary except when monitoring recovery from low blood sugar using the 15/15 rule (15 grams of carbs, retest in 15 minutes), though the original poster later clarified their educator wanted to map how their body specifically responds to food over time. A recurring theme was focusing on trends rather than obsessing over individual numbers, trusting that each person's response is unique, and valuing educators who take an active interest in personalized care.

A DiabetesTeam Member

When working as a phlebotomist I did many 3-6 hour glucose tests.

Generally we administered 75 gm of sugar by drinking a syrupy drink. Ranges are based on a starting fbs of 95 or lower. (5.3 mmol/L)

Normal Result range as follows

One hour after drinking the glucose solution: lower than 180 mg/dL (10 mmol/L)
Two hours after drinking the glucose solution: lower than 155 mg/dL (8.6 mmol/L)
Three hours after drinking the glucose solution: lower than 140 mg/dL (7.8 mmol/L

We should aim for as close to normal as possible.

July 25, 2023
A DiabetesTeam Member

@A DiabetesTeam Member
Thanks for the information. My diabetes educator asked me to check numbers 15 minutes after eating up to 2 hours.

Thanks again

July 25, 2023
A DiabetesTeam Member

@A DiabetesTeam Member
Thanks you are accurate. I met with the diabetic educator and she wanted to get a clear timeline in 15 increments of how my body responses to food. It was a great session. She was very helpful with explaining the findings and average A1C numbers. She said my numbers were good. Now I have an appointment with my primary doctor on Wednesday. I also plan to do the Diabetic Education class again for added support and to learn more about ways to stabilize the glucose numbers.

Thanks again

July 31, 2023
A DiabetesTeam Member

I test 120 mins after Dinner and 90 mins after the other three meals.

It’s best not to get too obsessed with BG numbers and how long after as all glucose have a certain amount of inaccuracy in them. Maybe better to look at trends, whether going up or down.

July 26, 2023
A DiabetesTeam Member

@A DiabetesTeam Member Good to know-I hope someone here can tell you what good numbers are.

July 25, 2023

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