Some words take an ‘s’ when you talk about more than one. These words are called count or countable nouns.
Other words do not take an ‘s’ when you talk about more than one. These words are called non-count or uncountable nouns.
1 piece of cheese
2 pieces of cheese
The word “food” is a non-count noun.
I like food.
I like some food for breakfast.
I like a lot of food for dinner.