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When To Test Blood Sugar After Eating


Make A Note Of Your Readings

Blood under the microscope after eating sugar. My test

It may sound obvious, but you must record your readings. Note them down in a diary, a notebook or in your phone calendar. Some meters have software that lets you do this. You could try a diabetes app too.

You and your healthcare team can then look back over your results to see if you need to adjust your treatment.

What Can Cause Low Blood Sugar Levels

Some things that can make low blood sugar levels more likely are:

  • skipping meals and snacks
  • not eating enough food during a meal or snack
  • exercising longer or harder than usual without eating some extra food
  • getting too much insulin
  • not timing the insulin doses properly with meals, snacks, and exercise

Also, some things may increase how quickly insulin gets absorbed into the bloodstream and can make hypoglycemia more likely. These include:


  • taking a hot shower or bath right after having an insulin injection increases blood flow through the blood vessels in the skin, which can make the insulin be absorbed more quickly than usual
  • injecting the shot into a muscle instead of the fatty layer under the skin
  • injecting the insulin into a part of the body used a lot in a particular sport .

All of these situations increase the chances that a person may get hypoglycemia.

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How Can I Treat Low Blood Sugar

If youve had low blood sugar without feeling or noticing symptoms , you may need to check your blood sugar more often to see if its low and treat it. Driving with low blood sugar can be dangerous, so be sure to check your blood sugar before you get behind the wheel.

Carry supplies for treating low blood sugar with you. If you feel shaky, sweaty, or very hungry or have other symptoms, check your blood sugar. Even if you dont have symptoms but think you may have low blood sugar, check it. If your blood sugar is lower than 70 mg/dL, do one of the following immediately:

  • Take four glucose tablets.
  • Drink four ounces of fruit juice.
  • Drink four ounces of regular soda, not diet soda.
  • Eat four pieces of hard candy.

Wait for 15 minutes and then check your blood sugar again. Do one of the above treatments again until your blood sugar is 70 mg/dL or above and eat a snack if your next meal is an hour or more away. If you have problems with low blood sugar, ask your doctor if your treatment plan needs to be changed.

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What If I Have Trouble Getting To My Blood Sugar Goals

There may be times when you have trouble reaching your blood sugar goals. This does not mean that you have failed. It means that you and your health care team should see if changes are needed. Call your health care team if your blood sugar is often too high or too low. Taking action will help you be healthy today and in the future.

/8the Right Time To Check Your Blood Sugar Levels

Blood Sugar Levels Chart

The perfect time to check the fasting glucose levels is right after your wakeup. And the right time to check postprandial glucose levels is two hours after you have your meals.

A gap of two hours after a meal must be maintained to get the correct reading.

This helps you choose the right foods and medication. When you test before your meal, it tells you how much medication you need and when you test two hours after eating, you know if your medicines are working fine for you.

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How Soon After I Wake Up Should I Check My Blood Sugar

Work with your doctor to come up with a schedule for testing your blood sugar. Factors for you and your doctor to consider in developing your schedule include the medicines you take, when you eat and how well-controlled your blood sugar is. Many people with diabetes find that it works well for them to check blood sugar first thing in the morning, but talk with your doctor to find out whats best for you.

Check your blood glucose immediately on awakeningbefore any morning activities, such as showering, shaving or putting on makeup. The reason for this schedule is that if your blood glucose is low, you can drink some juice or milk. If it is high, you can take your insulin immediately and allow it to work at least one hour before breakfast. It is important to get into this habit, because if you start the day with a normal blood glucose level before breakfast, keeping your blood glucose under control throughout the day is much easier. Monitoring your sugar immediately on awakening does not take a major change in lifestyle, but it is very effective in improving your blood glucose control.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.

/8different Times When You Should Check Your Blood Sugar Levels

– If you are someone who is newly diagnosed with high blood sugar, it’s important for you to take the blood sugar test more often. Note down this data and share with the doctor, it will help him shape an appropriate treatment plan for you.

– If you take insulin, doctors will recommend you to take three or more blood sugar readings throughout the day.


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When Should I Measure My Blood Glucose

Throughout the rest of your pregnancy, you will need to measure your blood glucose levels at various points through the day, to check that they are within the limits you have been given at each of those times:

When you get up You need to measure your blood glucose levels each morning when you get up, before you have anything to eat or drink. This blood glucose level is called your fasting blood glucose level because you will have an empty stomach. You must not have eaten or drunk anything apart from water overnight, for at least eight hours.

Your team should have discussed this with you and agreed the ideal morning blood glucose level for you to aim for.

Before or after every meal You will probably be asked to measure your blood glucose level around the time of a meal. Some services measure before eating while others measure one or two hours after a meal .


Again, you will have discussed and agreed an ideal blood glucose level after meals with your diabetes team. These levels will be higher than your fasting blood glucose levels, as you will just have eaten.

If you are taking insulin to help to control your blood glucose levels, you may need to do a separate test before you go to bed, or even during the night, although this is unusual.

“When we did go out for a special meal or two, and I’d have a little bit of cheesecake or something, it really affected my sugar levels. But that would’ve been just twice in the whole pregnancy.” Gemma, mum of one

How To Do A Finger

Day 24 – Testing my blood sugar after eating various foods

Your healthcare team will show you how to do it the first time, but these are the key steps:

  • Wash your hands with soap and warm water. Dont use wet wipes as the glycerine in them can affect the test result. Make sure your hands are warm so its easier to get blood and wont hurt as much.
  • Take a test strip and slot it into the meter to turn it on. Some meters will have tests strips built in.
  • Remove the cap from your finger prick device and put in a new lancet. Then put the cap back on and set the device by pulling or clicking the plunger.
  • Choose which finger to prick but avoid your thumb or index finger . And dont prick the middle, or too close to a nail. Place the device against the side of your finger and press the plunger. Use a different finger each time and a different area.
  • Take your meter with the test strip and hold it against the drop of blood. Itll tell you if the test strip is filled, usually by beeping.
  • Before you look at your reading, check your finger. Use a tissue to stop bleeding, then use it to take out the lancet and throw it away in your sharps bin.
  • You can use the same tissue to take out the test strip and throw that away too. Taking out the strip will usually turn the meter off.

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What If I Have Severe Low Blood Glucose And Cant Treat Myself

Glucagona hormone that raises blood glucose levelsis the best way to treat severely low blood glucose. Available as an injection or a nasal spray, glucagon will quickly raise your blood glucose level. Your doctor can prescribe you a glucagon kit for use in case of an emergency.

If your blood glucose level drops very low, you wont be able to treat it by yourself. Be prepared to address severely low blood glucose by

  • talking with your doctor or health care team about when and how to use a glucagon emergency kit. If you have an emergency kit, regularly check the date on the package to make sure it hasnt expired.
  • teaching your family, friends, and coworkers when and how to give you glucagon. Tell them to call 911 right away after giving you glucagon or if you dont have a glucagon emergency kit with you.
  • wearing a medical alert identification bracelet or pendant. A medical alert ID tells other people that you have diabetes and need care right away. Getting prompt care can help prevent the serious problems that low blood glucose levels can cause.

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How Much Does Blood Sugar Increase After Eating

At this time the blood sugar level can reach 7.8 mmol/L in a healthy individual.

After the half-hour mark, the blood glucose level starts to fall as the sugar is absorbed from the blood into the cells of the body.


Its important to check your normal blood sugar level 1 hour after eating. For example, if you find that your blood sugar is 160 mg/dL after the meal, this equates to 8.9 mmol/L which means your blood sugar is high. Its an indication that you may need to seek medical treatment to control your blood sugar level.

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Several Factors May Cause A Persons Postprandial Blood Sugar To Remain Elevated

Smoking after the meal: Studies show that smoking raises blood sugar levels in people with diabetes. Extreme stress: Stress produces the bodys fight-or-flight response triggering the release of stress hormones such as cortisol. These hormones cause the body to release the glucose it has previously stored for energy. Eating or drinking after the meal and before testing the blood sugar: Continuing to eat will keep blood sugars closer to their immediate post-meal levels.

Studies show that 15 to 20 minutes of moderate exercise, such as walking, shortly after a meal may improve glucose metabolism and reduce postprandial glucose levels.

How Often Need To Check Blood Sugar

Blood Sugar Levels Chart

This is a common question of how often to check blood sugar. People ask how many times should I check? Because it hurts, especially if youre doing finger sticks that sucks.


Suppose you have a CGM like a Dexcom d6 freestyle labret whatever great. But even then you sometimes have to do finger checks, and most of the time people dont understand when to do finger checks. If they are using a regular meter, then it is another story that you have to understand how many times because you dont want to check too many times.

So basically we are going to start with the most natural patient. So a primary patient who just got diagnosed with diabetes, theyre super nervous. Theyre checking their blood sugar seven-eight times a day well initially. That may be exciting, and you know if youre worked up you want to get this under control.

But eventually, you are going to burn out. So there is a more natural way to do this than just doing seven-eight times a day. Now if you want to, you know still have an understanding of where your blood Sugars are without doing eight times a day do the scattered map.

So scatter your blood sugar checks but make sure that its organized. Your doctor and yourself can look at it and have an understanding now. For example, if you want to check your blood sugar twice a day, this is how you can organize.

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Blood Sugar Level After 30 Minutes:

About half an hour after a meal, the digestive tract works in full swing to digest and absorb the nutrients taken during the meal. So, the proteins, carbs and fats are broken down by different digestive enzymes and are gradually absorbed in the body.

The blood is the carrier of these nutrients and it transports them throughout the body to supply energy to the different organs. The blood glucose level at this time is generally at its peak.

Who Should Monitor Blood Sugar Levels

If you have type 1 or type 2 diabetes, monitoring your blood sugar regularly will help you understand how medication like insulin, food, and physical activity affect your blood glucose. It also allows you to catch rising blood sugar levels early. It is the most important thing you can do to prevent complications from diabetes such as heart attack, stroke, kidney disease, blindness, and amputation.

Other people who may benefit from checking their blood glucose regularly include those:

  • Taking insulin

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Are The Test Times Youve Been Given Going To Help You Enough

One question to ask yourself is are the test times and targets youve been given going to help you manage your gestational diabetes the best you possibly can?

If you have only been asked to test your blood sugar levels before all meals one day and after all meals the next, is this giving you enough information to be able to understand how and where to adjust your diet to achieve the best possible blood sugar levels?

Likewise, if you have only been asked to monitor your blood sugar levels once a week, is this going to be sufficient enough for you to see whats happening and your tolerance to different foods. Or does it encourage you to follow a strict diet on the day you know youre testing on and to be less strict when you know you are not testing?

Normal Postmeal Blood Sugar Levels

Blood Sugar Levels After Eating

Checking your blood glucose one to two hours after eating can help you understand how your blood sugar reacts to the food you consume. It can also offer insight into whether you’re taking the right dose of insulin or if you need to follow up with your healthcare provider to discuss medication and diet or lifestyle adjustments.

There are two ways you can measure your blood glucose levels: by pricking your fingertip using a glucometer or by using continuous glucose monitoring. How often you should check your glucose levels varies from a few times per week to four to six times each day. As a general rule, the American Diabetes Association recommends keeping blood sugar below 180 mg/dL one to two hours after eating.


However, your target blood sugar range will depend on the following:

  • Duration of diabetes

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Blood Sugar Level After 2 Hours:

Another crucial time to check blood glucose level is about an hour and a half after a meal. Generally, around this time the process of digestion and absorption is near its end. So, high blood sugar during this time generally means that the body cant process sugar properly.

In case of a normal individual, blood glucose level at this time is below 7.8 mmol/L. If the sugar level is 11.1 mmol/L or more, then the individual is considered to be diabetic.

What About Fasting For A Blood Test During Pregnancy

There are several blood tests you may need if youre pregnant. These are designed to assess any potential health concerns that you or your baby might experience during pregnancy or after you give birth. Some of these tests will require you to fast beforehand. Your doctor will advise you how to prepare for each test.


Fasting is usually safe if youre pregnant, provided youre in good health and arent having a high-risk pregnancy. For your overall comfort, your doctor may advise you to drink extra water or to remain indoors, especially if the weather is very hot or humid.

Fasting may increase heartburn in some pregnant women. If you experience uncomfortable or concerning symptoms of any kind while youre waiting to have your blood drawn, let your doctor know immediately.

If youre seeing a doctor other than your obstetrician-gynecologist, make sure they are made aware of your pregnancy before your blood test.

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How To Manage After

Get medicine that works for you. The right insulin or medication program can make a big difference. In general, to cover after-meal spikes, those that kick in quickly and for a short time are a better choice than ones that work slowly over a long period. Your doctor can explain your options.

Keep blood sugar in check before meals. That way, even if it goes up after you eat, it won’t be so dramatic.

Watch what you eat. Limit sweets, white bread, rice, pasta, and potatoes. They tend to trigger post-meal spikes.

The type of fat you eat may play a role, as well. One study shows you may be able to curb blood sugar spikes after you eat if you skip foods with lots of butter and choose a meal made with a little olive oil instead.

Eat breakfast every morning. Even when you’re in a hurry to get out the door, don’t be tempted to skip it. A study shows that folks with diabetes who don’t eat breakfast get higher blood sugar spikes after lunch and dinner.

The ideal morning meal? It might just be one that’s packed with protein. A small study shows that when people ate a 500-calorie breakfast that was 35% protein, their post-meal blood sugar levels were lower than those who started their day with high-carb food. But check with your doctor to see what’s right for you.

Go for an after-dinner walk. It’s a healthy habit for everyone, but if you have diabetes, it’s also a good way to burn extra glucose from a meal.

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