Eating Safe Starches Lowers my Blood Glucose Levels

Recently, I have been aggressively monitoring my blood glucose levels and I have noticed a very interesting pattern. On days when I do not eat safe starches, my fasting blood glucose level the next morning is approximately 105. However, when I do eat safe starches (usually a sweet potato, regular potato, or white rice), the next morning my fasting blood glucose level is approximately 95.

So I have been testing this idea by purposefully not eating any safe starches one day and checking my fasting blood glucose level the next morning. Like clockwork, my blood glucose levels are higher the next morning. When I eat safe starches, the fasting reading the next day goes down to 95. I am getting a 10-point drop the next day by eating safe starches. This is a very consistent finding.

Even more curious, on days when I forego the safe starches, I am actually consuming fewer calories than the days when I eat them. My menus have been very consistent across all of these tests (I am trying to eat simple and dull meals, as suggested by Jenny Ruhl and Stephan Guyenet). So if I am eating less food, why are the fasting readings always higher? For purposes of full disclosure, my one hour readings are almost always below 125 and two hour readings are almost always below 100. Not bad for a type II diabetic. The Perfect Health Diet has effectively controlled my disease.

So is the consumption of safe starches actually contributing to lowering my blood glucose levels? That is what it looks like to me.

See my previous entries on safe starches here, here, and here.

Safe Starch Debate: A Diabetic's Perspective

There is a debate raging in the low carb blogosphere about the concept of "safe starches." Here is the start of the debate; here is Paul Jaminet's initial response, and here is the latest installment, featuring Dr. Ron Rosedale, with an response coming on Tuesday from Paul Jaminet.

One thing all sides have said: We do not necessarily recommend "safe starches" for diabetics. Well, I am a type II diabetic and a Perfect Health Diet follower, so I want to chime in with my experience.

First off, I have lost about 62 pounds, but 55 of that came following the diet described in the back of Gary Taubes' book, Why We Get Fat, which I later learned was the Atkins Induction phase. This helped to stabilize my blood glucose levels in about three weeks time, as well as returning my blood pressure to a normal range. But then I stalled and started reading more broadly about low carb diets. I discovered Gary Taubes didn't have all the answers, and I switched from the Atkins Induction diet to the Perfect Health Diet. I have been eating rice, potatoes, bananas, and other safe starches ever since, as well as fermented dairy products, such as plain, whole milk yogurt. I have also slowly lost another seven pounds. I enthusiastically recommend the book, Perfect Health Diet by Paul and Shou-Ching Jaminet.

Today, my fasting blood glucose reading was 105. Note that since following the Perfect Health Diet, my fasting blood glucose reading has gone down. Previously, I was suffering from the "dawn phenomenon." My blood glucose levels overall were well below 140 one hour after a meal and 120 two hours after a meal. Only my fasting BG reading was out of whack, usually between 120 and 130, first thing in the morning.

For dinner tonight, I had a fatty pork rib, green beans, and a small baked potato with butter and sour cream. For dessert, I had a half cup of vanilla ice cream. One hour after eating, my blood glucose level was 128 and two hours after, it was 112.

So not only am I losing weight on the Perfect Health Diet, my blood glucose levels have actually improved, thanks to the increased carbs counteracting the dawn phenomenon, just as Dr. Kurt Harris (another proponent of safe starches) said it would.

So for me, as a type II diabetic, this "safe starches" exclusion is pointless. I realize that I have greatly helped my diabetes situation by losing a lot of weight prior to switching to the Perfect Health Diet.  And I am taking Metformin Extended Release pills every day. Nevertheless, despite the type II diabetes, I am doing just fine on the Perfect Health Diet, thank you. I reject the diabetic exclusion of safe starches.

Rice Syrup and Blood Glucose Response

I have been pondering lately on what constitutes a "low carb" diet and have just finished reading Perfect Health Diet by Paul and Shou-Ching Jaminet (here is an overview of the diet). They suggest a low carb diet of 50 to 150 grams of carbs per day, with a bias towards more rather than fewer carbs (or, as they say in the book, 200 to 600 calories from carbohydrates). They recommend getting carb calories from safe starches, such as rice, taro, yams, and tapioca. This is substantially higher than most other low carb experts, but their book was compelling (I will review it at another time).

In the book, they say eating natural sweeteners are okay, especially if they come from the "safe starches" mentioned above. Specifically, they talk about rice syrup. So I bought some certified organic brown rice syrup from Now Healthy Foods. On the label, we read:

Unlike simple sugars, such as monosaccharides and disaccharides, Brown Rice Syrup is a polysaccharide, or a complex sugar. The unique structure of complex sugars allows them to be absorbed and broken down more slowly than simple sugars, avoiding rapid spikes in blood glucose. Slower absorption also allows the body to utilize complex sugars for energy instead of having to store them as fat for later use.

Based on this label and the Jaminets' claim that it is okay to use, since it is from a safe starch, I decided to do an N=1 test and see how my blood sugars reacted to it. I made some ice cream (one cup of cream, one cup of half and half, six egg yolks, one tablespoon of pure vanilla extract, and 1/4 cup of rice syrup). A serving size is one half cup and has about 220 calories and 11 grams of carbs, mostly from the brown rice syrup (it was delicious, by the way). To make this an even stronger test, I ate 3/4 cup of the ice cream, for 330 calories and 17 grams of carbs (my total carb count for the day is about 50, including the ice cream).

I ate the ice cream about two hours after dinner, and my blood sugar was 106 just before I ate the ice cream. Full disclosure: I am a type II diabetic and take Metformin. This probably had an impact on the test. Nevertheless, my results were very interesting. I ate the ice cream then tested my blood sugar at 15-minute intervals to see the blood glucose response. Here are the raw data:

8:20 p.m.          106

8:35 p.m.          109

8:50 p.m.          125

9:05 p.m.          137

9:20 p.m.          142

9:35 p.m.          130

9:50 p.m.          133

10:05 p.m.        116

10:20 p.m.        108

And here is a graph:

The blood glucose response was actually very normal for me. One hour after eating, the reading was 142 and two hours after eating, it was back down to 108. According to Jenny Ruhl, one hour after eating it should optimally be 140 or below and two hours after eating it should be 120 or below. But she also says the critical threshold to avoid organ damage is to have the reading be at least 140 or below two hours after eating. When I eat low carb (50 to 75 grams of carbs per day), my blood sugar is almost always 140 or below after one hour and 120 or below after two hours.

So for me, this is convincing evidence that, indeed, brown rice syrup is a safe sweetener. Not to be used in excess, but not problematic, either. I may have to strongly consider following this Perfect Health Diet .