In general reactive hypoglycemia is caused by gluten opiates A5 and B5.

RH is caused by the pancreas releasing insulin in greater quantity than is indicated for the amount of blood sugar. Everyone knows that the pancreas releases insulin into the blood in response to elevated blood sugar. The insulin acts as a vehicle, causing fat cells and other cells to absorb the glucose. But the pancreas also releases insulin in response to endorphin, the body's natural opiate pain killer. Muscle cells release endorphin during extreme exertion, like during fight-or-flight response. The insulin prevents muscle cells from destroying themselves.

Gluten A5 and B5 are opiates which mimic endorphin. In the presence of grassy grain peptides the pancreas releases excess insulin without any rise either in natural endorphin or in blood sugar. People have greater and lesser insulin responses to A5 and B5.

The excess insulin causes cells to over-absorb blood sugar. High blood sugar can be a problem for anyone. Low blood sugar is only a problem for carb-adapted people like you. Fat-adapted people can have low blood sugar with no ill effects. The biggest blood sugar problem comes not from low blood sugar, but from the fast drop in blood sugar.

I suggest, instead of medicating with sugar, that you stop ingesting grassy grains and sugar.