i think when we say we are craving a particular thing,i dont think its the body actually craving it,but more like our clever ol' brains putting it into our heads and thoughts that we really need it...
a lot of the time eating things comes from habit, and i think that we have a craving its more remembering what we would normally be eating at that particular time.. kinda like smoking and how half the battle to quit that its changing your habits (i quite over 2 years ago

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i used to have really bad eating habits, no breakfast or lunch,no proper meals as such,awful..i ate so much wrong stuff it was mad.. ive not had any sweet,chocolate,cake etc for nearly 7 weeks and the funny thing is i dont crave it anymore,saying no to a piece of chocolate is just natural now..
i did learn that when you eat something sweet and sugary,its great for a short time, then you come rushing down and crash,you feel twice as bad and only wanting more..
so i think dieting isnt just about what we put into our bodies, but also training our minds and habits to make right choices..
xoxo