Many people who experience uncomfortable, even dangerous, episodes of low blood sugar–hypoglycemia–are told to drink juice or eat something sweet to bring blood sugar back up. This is VERY BAD ADVICE that takes you closer and closer to diabetes, especially since people who experience this effect are at high-risk for type 2 diabetes and are often already pre-diabetic.
Virtually all hypoglycemia is preceded by HYPERglycemia, i.e., high blood sugar. The solution is therefore to not chase low blood sugars, but to not allow high blood sugars to occur in the first place.
This is why the Wheat Belly grain-free, limited carb lifestyle so effectively eliminates hypoglycemic episodes.