MSG is the sodium salt of Glutamate/Glutamic acid, which is one of the 20 common amino acids found in proteins. You need that.
Glutamate is also a potent neurotransmitter substance. An overdose is bad news for the nervous systems of many people.
Suppose you're looking for lots of energy. Fast, right now or over the next few hours?
1. Protein are digested into amino acids. Energy from those is a big cost to get at and you have to
pee away all the waste nitrogen. Steak and egg breakfast is silly.
2. Fats/lipids/triglycerides > fabulous energy reserves in the chemical structure
but you have an enormous energy demand to get your metabolism to do high volume processing.
3. Carbohydrates.
Simple ones, the sugars, can be loaded straight into your central metabolic pathway and trashed for their energy content.
Complex ones, the starches, need those extra front steps in metabolism to chop them up into the simple sugars.
As this takes some time, these are the fuel for the day. Some athletes refer to this as "carbo-loading."
Oatmeal, breads, even pastas and rice are your first meal for an active day.
I'll suggest that the pastas, together with the canned and condensed milks, are good starters.