Salt (milh)–Hot and dry in the third degree, salt, when taken moderately, is beautifying to the skin, giving it a soft glow. Salt causes vomiting when purging, and stimulates the appetite. Excessive use causes the skin to itch.
The Prophet (s.a.w.s.) recommended beginning and ending each meal with a pinch of salt. He said: “From the one who begins a meal with salt, Allah wards off three hundred and thirty kinds of diseases, the least of which are lunacy, leprosy, bowel troubles, and toothache. The rest is pre-scribed in the supreme knowledge of Allah.”
-(from chishti.org)