Hack my sweet potato fasting glucose tolerance test

Answered on August 19, 2014
Created March 19, 2012 at 6:31 PM

How worried should I be with the results of my home fasting glucose tolerance test completed with a sweet potato?

I tested because I feel much better with carbohydrate intake (perhaps around 100gram/day), but I'm not sure if I can tolerate it or not. I did have increased carbohydrate intake the previous few days (which is why I decided to take the test today), perhaps 150gram tops. I'm not sure how disconcerted I should be about the 1 hour mark, if the two hour seemed healthy.

Fasting BG: 86* all values are averages based on multiple measurements.

420 gram skinned, steamed sweet potato in 4 minutes (86.1 grams carb, 14 gram fiber, 27.3 sugar, 29.6 starch)

15 min: 118

30 min: 146

45 min: 179

1 hr: 169

1:15: 159

1:30 124

1:45 110

2 hour (immediately after 5 min hot shower): 95

2.5 (ran to store to get new strips): 99

3: 95

3.5: 86* *I intended to go on for 6 hours to catch any reactive hypoglycemia, but got pretty hungry, perhaps because I am not used to having a fat-free breakfast, very low protein breakfast, or perhaps because I was approaching reactive hypoglycemia.


Anyone else try this and want to post results for comparison?



on March 19, 2012
at 10:08 PM

I've come to think that that prescription is spot on for most people. I realize everyone is in different places as far as general health, overweight etc but all else being equal I think I agree: just eat carbs and lift weights and nearly all modern diseases will ameliorate

Medium avatar


on March 19, 2012
at 06:47 PM

Avoiding carbohydrates worsens glucose tolerance. Lifting weights increases it. Just lift weights and eat carbs.



on March 19, 2012
at 06:46 PM

Oh, sheesh, I forgot to give any numbers. My fasting bg has varied from 100 down to low 70s based on the previous day's meals or fasting. Mixed meal 1 hr is around 140, down to mid-90s by 2 hours. A starch/fruit meal may go above 160 at 45 min but is usually back to mid-80s by 90 minutes.



on March 19, 2012
at 06:43 PM

I don't have professional qualifications and the reading I've done is conflicting. Some say a high spike with return to normal by 2 hrs is GOOD, reflecting sensitivity. Others say we should never go above 140. My own results--for comparison only--are that moderate servings mixed with meat have shallower, longer responses. Eating fruit or starch on its own gives me higher peaks that are gone within 90 minutes.

  • 03525a7d89c96efe387b86be91fee9a5

    asked by

  • Views
  • Last Activity
    1432D AGO
Frontpage book

Get FREE instant access to our Paleo For Beginners Guide & 15 FREE Recipes!

1 Answers

best answer


on March 19, 2012
at 07:06 PM

Reactive hypoglycemia is most relevant with non starch carbs. Your levels are on the high end, considering you ate carbs on the days leading up to the test. It could mean nothing or perhaps inadequate carb adaptation (more days needed!). I doubt that you have IR since your fasting BG levels are pretty perfect and you return to fasting levels within 2 hours.

Answer Question

Get FREE instant access to our
Paleo For Beginners Guide & 15 FREE Recipes!