Having said that, I doubt there will ever be shortages of core staples like beans, rice, wheat, olive oil, sugar, eggs, etc.
Other advanced civilizations have run into the problem of shortage. During the dust bowl era, American children have died of malnutrition.
Sure, the prices of certain foods may go up, and you may have to eat chicken instead of prime rib for example. But that just means you have to be creative.
That goes along with what I said. I have already started to learn to improvise, use what is currently available rather than making a trip to the store.
Jeanette Isabelle