Why do we crave for certain types of food

Psychologist Dr. Brian Wansink has found that we make more than 200 food decisions each day but we are unaware of 90% of them.
People tend to get cravings when the brain starts calling for certain foods — often processed foods that aren’t considered healthy or nutritious.
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Even though the conscious mind knows they’re unhealthy, some other part of the brain seems to disagree.
Some people don't experience this and can easily control the types of foods they eat, while others can’t.

A craving is an emotional state characterized by a desire to consume a certain food. It should not be confused with simple hunger, which is different.
Cravings sometimes seem to appear out of thin air.
A person might be doing mundane things like watching a favorite TV show, walking the dog,
or reading. Then suddenly a craving for something like ice cream appears.
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Even though the cravings sometimes seem to come out of nowhere, they can be turned on by certain triggers, which are known as cues.
These cues can be as simple as walking past an ice cream parlor or smelling a pizza.

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