The reason I selected an hour after eating for postprandial measurements is that I had a Glucose Tolerance Test in 2008 and my blood glucose peaked 70 minutes after eating.
All measurements were made with a pair of Accucheck Aviva glucometers and a Bayer Contour USB glucometer. What does the science say? Jenny Ruhl has guidance on this at her excellent web site Blood Sugar 101.
My personal take on blood glucose targets and the selection of food to eat: my #1 goal is to never have to be on insulin. As a practical matter, I look at the results of the food tests in this web site and will, in the future, eat only those that have a minimal effect on my blood glucose.
The New Atkins for a New You recommends that those trying to lose weight limit net carbs (total carbs minus fiber) to 20g during induction, then gradually add carbs in 5g increments as long as weight loss is not halted or other problems do not arise. Got a Request?I’m a very busy guy with the site, but if you have a special request for an item that should be tested, let me know. Tuesday I was faced with the lovely task of chugging a bottle of orange-flavored sugar water {50 grams of dextrose aka sugar!} for the mandatory pregnancy glucose screening test. I had visions of nausea and light-headedness and general feelings of crappiness, but in reality, it wasn’t so bad. However, if I don’t pass…I’m not so sure I can handle the double strength version of the test.
Around 26-28 weeks, every pregnant woman has to go through the not so pleasant task of downing a super sugary artificially flavored drink and then sitting around waiting for an hour to have blood drawn.
Most of the time you don’t get any hint that you have gestational diabetes- most women do not experience any symptoms, other some experience increased thirst or urination, fatigue, blurred vision, or frequent infections.
Gestational diabetes puts you at risk for possible birth complications, the most apparent being macrosomia- a fancy term for a big baby. They made me sit in a closet (where they weigh you) and drink it while the CNA stared me down. Anyway, my doctor said I would go to the lab, drink the stuff, come up for my appointment, and then go back to the lab for the blood work to be drawn.
I had my appointment in between- I think it was mostly luck that the midwife was ready then though! I think super sugary flat orange soda is the perfect description- and it being cold would be so much better!
Glucose tolerance test – wikipedia, the free encyclopedia, The glucose tolerance test is a medical test in which glucose is given and blood samples taken afterward to determine how quickly it is cleared from the blood.


Glucose tolerance tests help to diagnose type 2 diabetes or impaired glucose tolerance - a condition that may lead to diabetes. Series NavigationOctober 2005 Glucose Tolerance TestMy 2010 Glucose Tolerance Test – Have I Goofed? Please use newer version of your browser or visit Internet Explorer 6 countdown page for more information. This is because of changes over the day in how insulin resistant by body is and in the amount of insulin I produce, lingering effects of previous meals, glucometer inaccuracies, and other factors. It usually takes me about five minutes to eat, though I drank 75g of dextrose, the stimulus for my GTT, in under a minute.
Both measurements for each test (one before and one after eating) were made with the same meter. I am very skeptical of these targets, which do not appear to fully consider the consequences of blood glucose levels this high or how lower targets can be reached with a very low carb diet. I am strongly motivated to avoid the need to inject myself with a drug that has to be carefully calibrated for the food I eat and the time I eat it.
The table below shows colors associated with various average blood glucose increases measured an hour after eating.
Richard Bernstein recommends that diabetics eat no more than 6 grams at breakfast, 12g at lunch and 12g at dinner for a total of no more than 30g per day.
Eric Westman has had clinical success with diabetes patients at Duke University with a diet of just 20g net carbs per day. I was dreading it- I do not like super sugary things, and I do not like drinking things fast. If you fail, you’re subjected to an even more wonderful three hour version of the test, where you drink a double strength or double volume drink and then have your blood taken each hour for 3 hours. Gestational diabetes is a form of diabetes that can occur during pregnancy, regardless of whether or not you had diabetes before hand.
Some people can keep it under control through diet and exercise, just like type 2 diabetes. It’s not uncommon for additional blood tests to be run with the same blood draw from your glucose test, specifically iron. I had to have the ultrasound first though so the sugar didn’t make the baby go crazy. He recommends subtracting half of the fiber from the total carb count to estimate effective carbs.


Everybody is tested because it doesn’t really matter what your risk factors are- you can still get it. A baby born to a mother with gestational diabetes also faces the risk of hypoglycemia- low blood sugar- right after birth, because the baby immediately loses the large supply of glucose from the  mother.  While gestational diabetes goes away after giving birth, having gestational diabetes also means you’re at a greater risk of developing type 2 diabetes down the road, so consider it a flashing warning sign. Pregnancy literally robs your body of iron- and it’s super important to keep those levels up. The worst part was having that much liquid in my stomach (for normal people it’s no big deal- maybe 8 or 10 oz?). At some point, I may get a continuous blood glucose meter to measure my total glucose response, but this is definitely a limitation of my current tests. Also, some of these food products are rarely eaten with no other, the way I tested them; sandwich bread might be eaten with peanut butter and sugar-free pickles, rather than carb-free cheese,  and a salad. Either way, you’ll probably be monitoring your blood sugar with finger pricks to keep an eye on things. I was really, really not looking forward to it because I hate sweet things too- the idea of a regular soda makes me gag. I do a lot of tests of each product and compute the average and standard deviation of the results. While being obese and unhealthy certainly increase your chances, it’s not unheard of for a perfectly fit and healthy woman to become diabetic during pregnancy. Luckily the doctors office called me the next day and told me my levels were completely normal… NO three hour test for me!
The hormones produced by the placenta cause insulin resistance, meaning it can’t work as well. Hormones are chemicals that are released into the bloodstream and work on various parts of the body. A glucose tolerance test helps to distinguish between this normal pattern and the patterns seen in diabetes and impaired glucose tolerance.



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