I'm no expert, I'm just an atypical type 2. Don't fit into the normal categories of being obese, in poor shape or whatever..My bloodsugar is constantly slightly elevated and I never get this sudden "drop" that you're describing. WR had some ideas worth listening to.
I think your theory is interesting, but the question is why this rapid decline happens.
If I may ask, what are you eating? If you eat a lot of carbs that could explain the "overproduction" of insulin, but anyhow there seems to be an issue with the metabolism. Could be several factors contributing.
Have you seen an endocrinologist? The "roller coaster" you're experiencing, with all the symptoms of hypoglycemia a few hours after eating is no fun. If you haven't seen a specialist I think that would be the next step. If you have seen one you might need to look for another. Or you could try different foods and monitor the effects on your blood sugar.
Much thanks for your information. I will follow up and look into what you said. One thing with the first answer I received from slyshot.
My blood sugar reading of 129 to 89 only took one hour, but it was several hours after eating. I felt fine at 129 but within that hour of taking it I began to get hungry and shaky and monitored the levels as they fell.
The only thing I can think of about why I am so drained a few hours after eating is that maybe my body is producin too much insulin and over compensating for the actual amount of sugar I took in??
Thanks again for all of your help.
Usually, the USA uses prandial [premeal] blood glucose ranges of 70-99 mg/dl as normal [some hospitals as low as 60 mg/dl] and then 100-125 as prediabetes. However, let's not confuse reference ranges as being the same world wide. They are not. Even hospitals and labs in the USA vary by some degree. Therefore, it is always best to check your copy of the lab results for your labs specific ranges.
In your case, LearnFromMistakes, you could be considered diabetes type 1.5 aka LADA [Latent Autoimmune Disease in Adults]. Similar to what you mentioned in your post, folks in this arena experience normal or slightly higher than normal blood glucose readings upon awakening, or before a meal, then lower blood glucose AFTER a meal [postprandial].
Educate yourself on LADA then discuss treatment methods with an Endocrinologist. Keep in mind not all doctors are educated on LADA. You may have to see several until you find one that is. Oral medication and basal injections may be prescribed. See these links
I believe that "normal" glucose levels varies to some degreee between indviduals, probably due to genetic factors. However there is a "reference" for Pre-meal plasma glucose in non-diabetics that ranges between 82-110.
Your fasting blood sugar of 115 is a little high, however it lies within the range of "normal" fasting blood glucose levels.
What strikes me is that you feel drained shortly after eating(the drop from 129 to 89 within one hour) . That clearly shows that your insulin is working.
The "roller coaster" effect could be counteracted with less carbs, but you would have to "replace" it with protein and more fat and the effects of this diet should be monitored closely by your doctor. Proteins and fat are metabolized much more slowly and don't affect the insulin production/realease directly. This should, at least in theory, keep your glucose levels more stable.
The symptoms you're describing are typical for hypoclycemia but could be due to other hormonal issues as well. Blood work should be run to rule out other explanations for them, like thyroid problems.
One last question that I left out:
I have been told that 89 is a good or semi "normal" level. Is it possible that 89 for me could be too low and for someone else 89 could be just right? Around 115-120 I feel fine.