Why did my blood sugar level drop after a high-glucose meal?

People who later on develop diabetes may before that develop hypoglycemia due to an overshoot of insulin release as a reaction to high sugar intake, maybe because already having some insulin resistance thus the pancreas releasing more insulin to compensate for that. read more

Usually, your sugar will be high after you eat a high glucose meal, and then you'll 'crash' a couple of hours later. You might want to check with your doctor and explain your symptoms. read more

For diabetics, blood glucose an hour after eating should remain below 180 mg/dL or no more than 80 mg/dL over your pre-meal levels. The highest spikes in blood glucose levels often occur after breakfast. If you experience hypoglycemia, or low blood glucose levels before a meal, you might experience a higher-than-normal spike over baseline levels; this doesn't necessarily indicate an abnormal rise. read more

Generally speaking, carbohydrate foods high in refined sugars or simple sugars have a high glycemic index. The sudden influx of glucose causes the release of large amounts of insulin, which removes too much glucose and causes blood glucose to drop. Eating foods with a low glycemic index helps avoid dropping blood sugar levels after eating. read more