The first step is to not give a damn about your health. After that, eat whatever the hell 你 want with no restraint. If 你 haven't experienced severe pains in your stomach after two weeks, 你 know it's a 安全 diet. If 你 have, 你 can ask this 问题 to a medical expert, since you'll need to see one then anyway.
I'm not too sure. My sister, she has a pretty high metabolism that no matter what she eats she seems to never put on the weight. But when I lived with her she wasn't always eating, mostly at meal times and if she wanted a snack. Either way I don't really have the answer. 你 could ask a doctor, they may have a better answer for you.. But be careful when it comes to salty foods, as 你 说 你 crave, if 你 have too much salt it could cause damage to your kidneys, not to scare 你 though.