I guess you should use salt, like everything else as you see fit, this world is now covered with studies about everything and most of them contradict each other, for example avocado, I have read stories were it is bad for your health and others were it is practically a life saver. Cigarrettes are bad for you right? Well for one my brother, who is 63 has been smoking since he was about 16, first thing he does in the morning is smoke a cig and he goes on to smoke at least 2 packs a day, and he checked his lungs and they are in better shape than mine and I only smoked for about 8 years and stopped 24 years ago, yet when I checked my heart the monitor showed I have a cloud of smoke there, so it depends on your physique (don't know if that word is right) but ultimately what I mean is do what you want to do, you will feel better for it.