Blood Sugar after Eating – Dr. Jeff Volek

Blood sugar after eating

The idea behind this short post is actually simple. Many people don’t know this and I think that it would pay a lot for most of us to know.

According to Dr. Jeff Volek we normally carry about 8 g of sugar flowing through our bloodstream (that’s approximately 2 tea spoons), in the form of glucose.

For the sake of you understanding better:  sugar=carbohydrate=glucose. So it’s one and the same thing.

Thus, after you finish eating there will be a rise in blood sugar due to the content of carbohydrate that was ingested (carbohydrate = bread, whole wheat foods, pasta, rice, sweets, potatoes, etc).

So, unless you have a high-fat-low-carbohydrate meal, your blood sugar will rise due to the amount of carbohydrate you eat.

And one tends to eat far more carbohydrates than 8 g per each meal. For reference, a portion of 100g of wheat bread (white or whole-wheat, doesn’t matter) has 50g of carbohydrate, which is ~6 times more than you normally carry in your blood.

Your body needs to take care of that high blood sugar, so what it does is that it stimulates the secretion of insulin, which will reduce the sugar in your blood to the normal level.

There are three things that take place at this particular point:

1. As long as your insulin focuses on lowering the blood sugar, the excess sugar (glucose) that your body will not use as immediate energy will go directly into the adipose tissue (so, it ends up in the fat storage).

2. The second thing that happens at high insulin levels is that all the fat you eat ends up in the fat storage.

3. The third thing that happens is that as your blood sugar level is back to normal, you’ll have the crash. You’ll feel less energyzed and you’ll be hungry.

Think of the situation when you had lunch at noon and you feel tired and hungry three hours later. This is what practically happens inside of you.

However, eating a high-fat meal does not stimulate blood sugar, hence insulin levels. This means that your body can burn the fat that you give it, as long as carbohydrate intake is very low.

If you check Jeff’s presentation, he’ll make you understand better than me 🙂


1. Jeff Volek – The Many Facets of Keto-Adaption

2. Stephen Phinney and Jeff Volek – The Art and Science of Low Carbohydrate Living

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4 Responses to Blood Sugar after Eating – Dr. Jeff Volek

  1. Jan Koch says:

    Thank you for backing up your post on ketogenic nutrition Chris! This makes me even more confident that it’s a good choice to try it.

    The only thing I’m really missing is juices, I’m going to replace them with different kinds of tea (no sweetener) and see how that develops. Oh, Coke Zero is great too 😉

    Btw. you asked for details on my nutrition before and during the 13 hour table tennis tournament. The day before (including 2 hour intense table tennis) I ate fries and chicken wings. During the tournament I ate a sausage with potato salad, some sandwich cookies with chocolade and drank approx. 4 liters of water.

    10 matches over the time of 13 hours where exhausting, but nevertheless I felt more energized than ever. Before changing the nutrition I wouldn’t have made it through 10 matches.

    So thanks for introducing me to ketogenic nutrition!

    • Chris Chris says:

      Yes Jan, I use diet coke when drinking alcohol. even though diet coke doesnt have anything to do with the word “natural” as more than 100% of its content is artificial, it doesnt spike insulin levels. so it fits to the purpose, lol. on occasions, of course.

      wow, you definitely threw on that one. those are high amounts of carbs 🙂 there’s no way you couldnt have felt energized. anyways, like I said above: it was fit with the purpose.

      You’re welcome Jan, your insight helps me a lot and I think that if we stick to it and analyze it in the context of athletic performance as well as mental performance, we’ll get a better insight on it!

  2. Great site and a great topic as well. I was looking for this on the internet and found it on your website. I needed this kind of tips. My wait is finally over. Thanks a lot for sharing.

  3. Brian says:

    You have done well with this article doctor. In fact, you are a genius. I am completely in love with this short, concise and informative post. Anyway, Doctor, I read some lines from this site which I would like you to shed more light on; They said exercise lowers blood sugar. I don’t understand the link. Then I read again from another site that too much exercise isn’t ideal to lower blood sugar. Please help out. Thanks in advance.

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