Slitherine

Is there negative effect if region or entire province have 0 food like revolt risk?
If there is no army and I do not need new population is it ok to have 0 food and negative food income?
I did notice regions will sometimes get 25 food and is that random?

Is there negative effect if region or entire province have 0 food like revolt risk?

If you have 0 food your population will not grow and you will not open up new build slots in that region. If an army moves into that region it will start to lose troops due to lack of food. Revolt is based on the local loyalty which as far as I know is not based on food availability.

If there is no army and I do not need new population is it ok to have 0 food and negative food income?

It is your choice but you won't suffer an other negative results. The region will not produce new populations and will not open build slots.

I did notice regions will sometimes get 25 food and is that random?

It is a random event. May be based on food production but I am not sure.

Though if you are part of a region it will affect the other regions. If negative food production it will suck our the food from the others and it will anyway take part in the internal distribution of that province.

I know you can lose buildings if you let the infrastructure go into the negatives, I figured it would be the same with pop and food...
Am I the only one that wants region to lose pop if they don't have enough food?

It is good to know that buildings can be lost if there is no infrastructure in reserve.

The solution is usually to demolish the buildings that contribute the least and then build some high food buildings.

Am I the only one that wants region to lose pop if they don't have enough food?

Quite possibly yes. never tried such a strategy myself.