. >> reporter: lindsey cain a registered dietition for wellness says once you decode the message fill that need with united states in, seed and other nuts. >> i'm sorry go get humus. >> reporter: can't live without salty, crunchy chips. >> what they are craving is salty food that have fat in them. >> reporter: you are grabbing at a key piece of health information when you reach inside that bag. >> somebody that crave something like salt, it could be that they are actually need hydration. >> reporter: in fact our experts say a whooping 80 percent of us are dehydrated. >> it is important to give yourself that moment to drink water. >> reporter: cain says if you have a sweet tutor carbs crazy those doughnuts or bagels calling your name can be calling out, and many balance a lot have of those sweet cravings are indicators that we are not eating regularly enough throughout the the day and our blood sugars are out of whack. >> reporter: do you just need a big juicy stake? you may just need more of a certain nutrient or mineral. >> sometimes it is iron related. but really what it is your bod