The Dead Sea is actually a lake that is located between Jordan and Israel. It is called “dead” because the water is so salty that only a few kinds of simple plants can live in it. Fish are unable to live in the Dead Sea. The lake is fed by the Jordan River, but it has no outlet.
Water can leave the Dead Sea only when it is evaporated by the sun. Evaporated water leaves its salts behind. This explains what makes the Dead Sea the saltiest body of water in the world. The extremely heavy salt water prevents bathers from sinking deeper than their armpits.
The waters of the Dead Sea have been renowned for their therapeutic effects since ancient times. Two thousand years ago, Flavius wrote that the salts from the Dead Sea heal the human body.
The waters from the Dead Sea are unique in that they contain 27% of various salts as compared to 3% in normal sea water. Further, while sodium accounts for approximately 80% of the salt content of normal sea water, it comprises much less of the salt total in water from the Dead Sea. The salts in the Dead Sea water are magnesium, potassium, calcium chloride and bromides.
Magnesium is important for combating stress and fluid retention, slowing skin aging and calming the nervous system. Calcium is effective at preventing water retention, increasing circulation and strengthening bones and nails. Potassium energizes the body, helps to balance skin moisture and is a crucial mineral to replenish following intense exercise.
Bromides act to ease muscle stiffness and relax muscles. Sodium is important for the lymphatic fluid balance (this in turn is important for immune system function). So we can see that bathing in high quality sea salt could replenish the minerals which are critical to our skin metabolism.