My experience of the Dead Sea :
I think the salt and minerals disinfected and pulled the skin tight (it does de-hydrate) - as you only bathe once or twice a day in the sea for 20 minutes it's not the effective part of the treatment, only a supplement.
The real 'cure' although temporary, is the blazing sun which doesnt have the same levels of UVB rays due to the dead sea being the lowest spot on earth. I took piccies of the same leg every night and it seemed to be 'burning' each layer of p off until it got down to my real skin! Yes chaps, it's still under there, believe me!
It's an intense form of light treatment that you can get in this country.
Fabulous though, and worth the cost for even the slightest break (I got about 3 months off, before it came back this time)