going to be the pick-me-up. there is nothing wrong with coffee in moderation. reporter: beller says craving caffeine indicates a need for energy and could alone mean you are dehydrated. instead of coffee or sodas all day long, what is a better option? you might need water to quench your thirst. that might be a good tradeoff. mm. mm. reporter: what about if you crave ice? it could mean you are bored, dehydrated. thirsty. just consumed a hot beverage. want to cool your mouth off. there have been case reports of people craving ice when they have iron deficiency anemia. reporter: are you quick to order mashed potatoes and mac and cheese? you may be lacking serotonin. a feel-good hormone. sometimes a treadmill can do that increases serotonin. we encourager exercise. reporter: beller says to turn to healthy comfort foods like whole wheat pasta andyams or getting a massage. craving for fatty food may be your brain telling you don t go cold turkey.