How could a lack of salt make you want sugar?
But it does! It's known -- but not by most doctors because they're not trained in nutrition.
It's not salt which predisposes you to high blood pressure or heart problems -- it's sugar and carbohydrates. The accepted theory that salt and sodium are the problem has been in dispute for eons (but we never hear much about it) and testing has been wildly inconsistent.
In fact, it's
low levels of salt in the body which cause our blood sugar and insulin resistance to rise (and the higher your blood sugar and insulin resistance, the more your insulin surges and then more sugar and carbs you crave). That's how salt can curb your sweet tooth.
Taking a small dose of salt (followed by at least a half-a-glass of water) can also increase mood, energy and relaxation (and do so quickly).
Also, your taste buds will "flip" when you're approaching having too much sodium -- so there's a safety switch in your body to protect you from getting too much salt... Not so for sugar, as you can become sick as a dog from consuming too much sugar and carbs, and yet you'll still crave more!
PS: also get plenty of potassium and magnesium --- and cut out the carbs.