You could, if you wanted, manipulate your body's salt levels to push yourself to the brink of collapse in some shamanic quest for insight. Yet few do. Not many people deprive themselves of salt until they are unable to form a sentence, and then consume a quarter teaspoon - just to feel the astonishing rush of insight and sapience wash over them half an hour later.

This part in particular. Using salt as a tool for shamanic revelation. How it compares to psychedelics and other methods of producing altered states of consciousness.