A streamlined stack of supplements designed to meet your most critical needs - Adapt Naturals is now live. Learn more

How to Prevent Diabetes and Heart Disease for $16

by

Last updated on

iStock.com/lisas212

In the last article in this series on diabesity and metabolic syndrome, we discovered that the blood sugar targets established by the American Diabetes Association are far too high, and do not protect people from developing heart disease, diabetes or other complications. And we looked at what the scientific literature indicates are safer targets for fasting blood sugar, hemoglobin A1c and either OGTT or post-meal blood sugar.

On the other hand, we also discussed the importance of context: why it’s important not to rely on a single blood sugar marker, and how healthy people can sometimes have blood sugar spikes above 140 mg/dL one hour after a meal. Please keep this in mind as you read through the rest of this article.

In this article I’m going to introduce a simple technique that, when used properly, is one of the most effective ways to maintain healthy blood sugar and prevent cardiovascular and metabolic disease – without unnecessary drugs.

I love this technique because it’s:

  • Cheap. You can buy the equipment you need for $16 online.
  • Convenient. You can perform the tests in the comfort of your home, in your car, or wherever else you might be.
  • Personalized. Instead of following some formula for how much carbohydrate you can safely eat, this method will tell you exactly what your carbohydrate tolerance is, and which carbs are “safe” and “unsafe” for you.
  • Safe. Unlike the oral glucose tolerance test (OGTT), which can produce dangerous and horribly uncomfortable spikes in blood sugar, this strategy simply involves testing your blood sugar after your normal meals.
The strategy I’m referring to is using a glucometer to test your post-meal blood sugars. It’s simple, accessible and completely bypasses the medical establishment and pharmaceutical companies by putting the power of knowledge in your hands.

It’s one of the most powerful diagnostic tools available, and I use it with nearly all of my patients. Here’s how to do it.

Step One: Buy a Glucometer and Test Strips

A glucometer is a device that measures blood sugar. You’ve probably seen them before—they’re commonly used by diabetics. You prick your finger with a sterilized lancet, and then you apply the drop of blood to a “test strip” that has been inserted into the glucometer, and it measures your blood sugar.

There are literally hundreds of glucometers out there, and their accuracy, quality and price varies considerably. The one I recommend to my patients is called the Relion Prime, which can be found at Walmart.com. (Note: as a rule I don’t like to support Walmart, but I haven’t been able to find this unit anywhere else at a similar price.) Even better, the test strips, which you’ll need on an ongoing basis to monitor your blood sugar, are relatively cheap for the Relion Prime. You can get 50 of them for $9.00 at Walmart.com ($0.18/strip).

If you’d like the option to sync your readings to an iPhone or iPod Touch, the Relion Prime syncs with the Glooko MeterSync Cable. The Glooko cable (with the free app on your iPhone/iPod Touch) allows you to sync all readings, as well as track factors that affect your glucose level, such as carbohydrate intake, activity level, and how you’re feeling. Though the cable costs $39.95 on Amazon, it’s a worthwhile investment if you plan on tracking your glucose levels over a long period of time.

I’m sure there are many other choices that work well, but this is the unit I have the most experience with, and in general it is very reliable. Another good choice is the TrueTrack meter drugstores sell under their own brand name (i.e. Walgreens, Sav-on, etc.). Other models to consider are the One Touch Ultra or one of the Accu-Chek meters. The problem with these, however, is that the test strips tend to be more expensive than the Relion Prime.

Step Two: Test Your Blood Sugar

  1. Test your blood sugar first thing in the morning after fasting for at least 12 hours. Drink a little bit of water just after rising, but don’t eat anything or exercise before the test. This is your fasting blood sugar level.
  2. Test your blood sugar again just before lunch.
  3. Eat your typical lunch. Do not eat anything for the next three hours.Test your blood sugar one hour after lunch.
  4. Test your blood sugar two hours after lunch.
  5. Test your blood sugar three hours after lunch.

Record the results, along with what you ate for lunch. Do this for two days. This will tell you how the foods you normally eat affect your blood sugar levels.

On the third day, you’re going to do it a little differently. On step 3, instead of eating your typical lunch, you’re going to eat 60 to 70 grams of fast acting carbohydrate. A large (8 oz) boiled potato or a cup of cooked white rice will do. For the purposes of this test only, avoid eating any fat with your rice or potato because it will slow down the absorption of glucose.

Then follow steps 4 through 6 as described above, and record your results.

Step Three: Interpret Your Results

If you recall from the last article, healthy targets for blood sugar according to the scientific literature are as follows:

MarkerIdeal*
Fasting blood glucose (mg/dL)<86
OGGT / post-meal (mg/dL after 1 hour)<140
OGGT / post-meal (mg/dL after 2 hours)<120
OGGT / post-meal (mg/dL after 3 hours)Back to baseline
Hemoglobin A1c (%)<5.3

*To convert these numbers to mmol/L, use this online calculator.

Hemoglobin A1c doesn’t apply here because you can’t test it using a glucometer. We’re concerned with the fasting blood sugar reading, and more importantly, the one- and two-hour post-meal readings.

The goal is to make sure your blood sugar doesn’t consistently rise higher than 140 mg/dL an hour after a meal, but does consistently drop below 120 mg/dL two hours after a meal, and returns to baseline (i.e. what it was before you ate) by three hours after a meal.

There are a few caveats to this kind of testing. First, even reliable glucometers have about a 10 percent margin of error. You need to take that into account when you interpret your results. A reading of 100 mg/dL could be anything between 90 mg/dL and 110 mg/dL if you had it tested in a lab. This is okay, because what we’re doing here is trying to identify patterns—not nit-pick over specific readings.

Second, if you normally eat low-carb (less than 75g/d), your post-meal readings on the third day following the simple carbohydrate (rice or potato) challenge will be abnormally high. I explained why this occurs in the last article, but in short when you are adapted to burning fat your tolerance for carbohydrates declines. That’s why your doctor would tell you to eat at least 150g/d of carbs for three days before an OGTT if you were having that test done in a lab.
If you’ve been eating low-carb for at least a couple of months before doing the carbohydrate challenge on day three of the test, you can subtract 10 mg/dL from your one- and two-hour readings. This will give you a rough estimate of what your results would be like had you eaten more carbohydrates in the days and weeks leading up to the test.
It’s not precise, but it is probably accurate enough for this kind of testing.

Third, as I said above, an occasional spike above these targets in the context of other normal blood sugar markers is usually no cause for concern.

Like what you’re reading? Get my free newsletter, recipes, eBooks, product recommendations, and more!

Step Four: Take Action (If Necessary)

So what if your numbers are higher than the guidelines above? Well, that means you have impaired glucose tolerance. The higher your numbers are, the further along you are on that spectrum. If you are going above 180 mg/dL after one hour, I’d recommend getting some help—especially if you’re already on a carb-restricted diet. It’s possible to bring numbers that high down with dietary changes alone, but other possible causes of such high blood sugar (beta cell destruction, autoimmunity, etc.) should be ruled out.

If your numbers are only moderately elevated, it’s time to make some dietary changes. In particular, eating fewer carbs and more fat. Most people get enough protein and don’t need to adjust that.

And the beauty of the glucometer testing is that you don’t need to rely on someone else’s idea of how much (or what type of) carbohydrate you can eat. The glucometer will tell you. If you eat a bowl of strawberries and it spikes your blood sugar to 160 mg/dL an hour later, sorry to say, no strawberries for you. (Though you should try eating them with full-fat cream before you give up!) Likewise, if you’ve been told you can’t eat sweet potatoes because they have too much carbohydrate, but you eat one with butter and your blood sugar stays below 140 mg/dL after an hour, they’re probably safe for you. Of course, if you’re trying to lose weight, you may need to avoid them anyways.

You can continue to periodically test your blood sugar this way to see how you’re progressing. You’ll probably notice that many other factors—like stress, lack of sleep and certain medications—affect your blood sugar. In any case, the glucometer is one of your most powerful tools for preventing degenerative disease and promoting optimal function.

Nutrient deficiency is another critical factor to consider if you’re struggling with high blood sugar. Studies have shown that inadequate intake of vitamin D, magnesium, biotin, chromium, thiamine, choline, vitamin C, and EPA/DHA may contribute to both diabetes and obesity and that correcting these deficiencies helps to maintain normal blood sugar.

A nutrient-dense, whole-foods diet should always be the foundation of how we consume nutrients. Sadly, due to declining soil quality, a growing toxic burden, and other factors in the modern world, we can no longer rely on food alone to meet all of our nutrient needs. This is where smart supplementation can play a role. I formulated Adapt Naturals to add back in what the modern world has squeezed out and provide you with all of the nutrients you need to feel and perform you best.

ADAPT Naturals logo

Better supplementation. Fewer supplements.

Close the nutrient gap to feel and perform your best. 

A daily stack of supplements designed to meet your most critical needs.

Chris Kresser in kitchen
Affiliate Disclosure
This website contains affiliate links, which means Chris may receive a percentage of any product or service you purchase using the links in the articles or advertisements. You will pay the same price for all products and services, and your purchase helps support Chris‘s ongoing research and work. Thanks for your support!

306 Comments

Join the conversation

  1. “I’ve seen another strange pattern a few times where the patient’s blood sugar actually decreases after the meal at the 1- and 2-hour mark, and then increases at the 3-hour mark. ”

    This is actually something that seems to be happening with me. I am a “paleo” eater (no grains, low carb) and my FBG usually runs between 95-101 which i attributed to low-carb morning insulin resistance. However, today and yesterday I did a BG text 1/5 hour after breakfast (eggs, bacon, tomatoes, coffee/heavy cream” and my BG dropped both days from a FBG of 105 to 95 yesterday and 80 today. Today I monitored more carefully and at 1 hour it was 90, 2 hours 80, and three hours 104. I hour after lunch it was 95.

    Do I need to worry about this?? Whatever the explanation, and they are all theoretical, my BG seems to be staying in a narrow range (80-105) without any of the post-prandial peaking; in fact no peaking at all nor is it dropping particularly low nor do I have any feeling of low BG.

    I am otherwise healthy with an HDL of 88 and TG of 67 (haven’t had a VAP or NMR yet). I lost about 7/8 pounds since starting paleo/lc and now have a BMI of 20 (5:11/143 pounds). No matter how much I eat, my weight doesn’t budge more than .5 pounds either way. I am probably too thin but I don’t feeling like eating more than the 2500 calories I take in usually.

    So, once again, aside from the reverse pattern I seem to have developed, is there some negative health implication in this that I am missing?

  2. And because posting of personal experience and results is usually encouraged:
    morning FBG – 4.4 mmol/l
    last time, I promise

  3. Hi Stan

    Where does the beef come from? If it comes from Ireland or certain other European countries, it will be grass fed.

  4. Hi Lynn

    Here, Bulgaria, it is mostly pork and chicken meat, beef is very small part and mostly imported. Cows are milk breeds mainly. There are eggs from open raised hens (I eat these), at least twice the price of conventional cell raised. Dairy is not raw.

  5. Hi Stan

    Strange question, but are you SURE you don’t have grassfed meat where you are? The reason I ask is because it’s never advertised on packages here (I live in Ireland); because ALL our beef is grass fed. There is no such thing as factory farmed beef.

    We do not have raw dairy here though.

    • Yep. The beef here in New Zealand is mostly grass-fed so it’s not specified as that but now supplementary feeding in on the agenda so they can stock higher densities of beef cattle on more marginal high country terrain.

  6. Thanx for all the comments. This blog is fantastic. I guess some more info is needed.
    I am 170 cm/66 kgs. Started a vegan diet 6 y ago (without packaged junk, sugar) after I was told to take pills for life for high blood pressure (140/90, “your dad had it so it should be genetic”). It helped, I lost 3 kgs (that was never a problem) and was feeling pretty good and “light”. I also did water fasts 1-2 times per year. But since I was reading a lot about nutrition I eventually introduced fish and eggs about 2 y ago, then dropped wheat, grains, legumes, potatoes (reintroduced about 6 months ago). I eat about 2 pieces of fruit during the day (mostly banana, apple, melon and other in season) and main meal in the evening, and lots of nuts (100 gr/day), regular vegetables blend. I use ev olive oil. I do not eat dairy, clarified butter was added recently (I do it at home). My nose is mucus free, I am glad and want to stay like this. Now I also eat chicken liver, vary rarely other meats (no good sources here). I do not have any major health issues. So it is obvious I made a lot of changes to my diet the last several years. Exercise – not much, avoiding elevator twice a day for 6 floors, push-ups, crunches, squats, stationary bike all at home.
    BG tests today:
    FBG morning – 6.2 and 5.1 from same spot
    Before main meal – 4.5 and 5.9 same spot, 5.0 new spot (I will stick to one testing, just these were the last strips from the batch)
    carbs – 200 gr potatoes with butter (half from yesterday), raw vegitables – carrots, zuccini
    new batch of test strips
    1 hr – 6.3
    2 hr – 4.9
    3 hr – 5.2

    I am skeptical about these BG meters. They are essential for people with diabetes, showing major differences low and high. But for normal and pre-diabetes they have too big variance – 100 mg/dl may be 80 or 120. I may limit potatoes and bananas, and fruit to one piece. But my problem is that I have been eliminating foods all the time. We have driven ourselves into the position to produce very few decent foods here in Eastern Europe, people want cheap food and compromise or do not know about quality. We do not have grass-fed free-pastured meat or dairy (or it is not promoted), for example.

    Sorry for the long post.

  7. Stan: it seems you may have a delayed insulin response. Your triglycerides are quite high, especially in relation to your total cholesterol. Ideally your TG should be less than 1/2 of your TC. How long have you been following this diet?

    Stress, sleep deprivation and cortisol dysregulation can also cause elevations in fasting BG and 3-4 hour post-meal readings.

  8. Since you are fairly new to using the meter, are you certain that your hands were clean before each check?

    If you are confident that the testing is correct, then your personal peak for that meal seems to be at the 3 hour mark and it is a little high. Perhaps try sweet potatoes instead of the potatoes? Are the carrots cooked or raw?

  9. Hi Chris

    Following a recent FBG test that showed 6.1 mmol/l (previous test june’10 – 4.5), I decided to invest in a BG meter. The first day I tested – before main meal 4.4, 1hr 5.7, 2hr 5.3, 3hr 7.3, then I decided for a 4hr test 5.3. Meal included potatoes with clarified butter. The next morning two tests 6.2 and 5.3 – one after the other, and that is quite a variations which I understood is normal 20% variance. I do not eat grains, legumes, sugar etc. Major carb food I eat is potatoes 3-4 times/week, nuts, carrots, zuccini.
    Now I am completely confused. I would appreciate any comment. Thanx.
    By the way some more data from the same lab test:
    TC – 170 mg/dl, TG – 130 mg/dl, HDL – 45 mg/dl

  10. Hay que comer mas grasas saturadas y menos carbohidratos. Carbohidratos aumenta trigliceridos y “small, dense LDL”, y reduce HDL, mientras que grasas saturadas reduce trigliceridos y “small, dense LDL” y aumenta HDL.

  11. Hola, en mi última analítica tengo estos resultados:

    Cho total: 217 mg / dl
    TG: 181 mg / dl
    HDL-Cho: 39 mg / dl
    LDL-Cho: 146 mg / dl

    Tengo 33 años.

    Estoy algo preocupado, por los valores de trigliceridos y hdl.¿Que debo hacer?

  12. Chris,

    At 3 hours, I’m been at or near baseline/FBG. But I’ve only tested 3 hours on starchy meals a couple of times, so I’ll need to verify that after a few more measurements.

  13. Thanks Chris,

    I guess the crux of my question is whether for someone with fairly normal glucose control is it better to cycle between roughly 85 – 130 a few times during the day, or is it ok to eat more frequently but have your sugars range from say 105-130 except during the longer nightly fast? Is there harm staying a little bit high, or benefit from getting down to 85 several times daily?

    Thanks for the continued education!

    • If you’re not having any reactive/hypo events (dropping below 70-75) then there’s no need to eat frequently throughout the day, and it’s probably better if you just fast between meals.

  14. Hi Chris,

    I’ve taken up this challenge and found some things I’m a little confused about.

    My FBG and post-meal numbers have been generally good (FBG in mid 80s), with one sticking point. After a starchy meal (white rice or potatoes), I’ll have fine 1hr post-meal numbers (between 105 and 115, though I’ve had a few register in 120s and 130s, never anything over 140). But at 2hrs, the number will be the same, and often a little bit higher. This does not happen with low carb meals, which consistently give me numbers below 100, and baseline at 2hrs.

    Could it be that I have a problem with starches? Is it something to worry about, even though my numbers don’t get all that high?

    For background, I’ve been on a pretty low carb diet for the past couple of years (rarely over 70g/day, with some cheating on weekends). But for the past month or so I’ve reincorporated safe starches back into my diet.

    • You may have a delayed or compromised phase 2 insulin response, or you may have delayed gastric emptying or slow digestion when you eat starch. When you eat starch, what are your numbers at 3 hours?

  15. Thanks!!!

    I appreciate your words.
    One the other hand I’m very interested in the connection between high insulin and IGF-1 and acne. Do you think drinking milk would increse them? Could other dairy products do the same?
    Maybe, there’s a post about this because I still haven’t read all.

    • I think the acne/dairy connection, when/if there is one, is more related to food intolerance than IGF-1. The only way to find out is to remove dairy for a period of time, and then add it back in and track what happens.

      • Someone very close to me has been to doctors for years concerning shoulder/back acne. Antibiotics, acids, etc. All worthless. A week or so into a ketogenic diet (for prediabetes) fixed the problem swiftly and completely. We only monitor the person’s bg and ketones so I can’t say anything about IGF-1.

  16. Rodney: some people with reactive hypoglycemia and adrenal/cortisol issues do better with small meals throughout the day. It doesn’t raise their blood sugar, but rather keeps it from plummeting if they wait too long to eat. The only way to determine your ideal is to try different approaches and test for each.

  17. Hey Chris,

    What are your thoughts on how “grazing”, or eating small snacks throughout the day between meals affects blood sugar levels? It would seem the levels would always be moderately elevated except between the last meal of the day and breakfast the next day. If so, is this where 16 hour IF’s come to the rescue? Or, is it better not to eat so frequently during regular daytime hours to give sugar levels a chance to recover to baseline?

    All of this assumes no readings would be above the 140 danger threshold.

    I am just wondering what approach to take after I finish your sugar testing as outlined above. Cut the snacks way down in frequency or don’t worry about it?

    Thanks,

    Rodney

  18. No te preocupes, Raquel. The most important number is the ratio between triglycerides and HDL. If that number is <2, you're at low risk for heart disease. In your case, it's not only below 2, it's below 1 (0.65), so you're in a good place. A TG/HDL ratio of <2 suggests you have predominantly large, buoyant LDL, which as you know from the video, is not a risk factor for heart disease.

  19. Hi Chris!!!

    I’m Raquel from Spain (woman, 45). I really like your blog and I follow it everyday.
    Recently I have my new cholesterol test results:

    Total Cho: 266 mg/dl
    TG: 51 mg/dl
    HDL-Cho: 79 mg/dl
    LDL-Cho: 177 mg/dl

    I read your post “I have high cholesterol and I don’t care” and I’ve deduced that there isn’t any reason to be worried about because my LDL is in the large buoyant type.
    Since two years ago I follow a diet similar to Zona, but recently (since I dicovered you) I decided eat more saturated fats (though here, we eat and cook with olive oil a lot), eggs, butter, cream, and whole fat foods. I wanted to make an experiment and see what happens, however I wasn’t sure (our whole life we’ve heard about fatty monster and it’s in our collective subconscious) and here in Spain, most doctors also wants reduce your total cholesterol at all costs.
    Finally, as I have your opinion into high consideration, should I have anything to be worried about?? I know what my doctor will say (high total Cho, high LDL)

    Thanks a lot

    Raquel