...any problem or symptoms related to low blood sugar?
I would think that the insulin response from an amino acid bomb like Vega would deplete you of carbohydrates, unless you also consumed some easy-to-assimilate carbs like glucose or maltodextrin at the same time. This would make it very undesirable for anyone who needed to do anything besides go into a comatose sleep for several hours. You'd get stuck in a cycle of unnatural food consumption.