Several studies demonstrate that Dead Sea minerals can have a positive effect on psoriatic skin (Sources: Israel Journal of Medical Sciences, November 2001, pages 828–832; British Journal of Dermatology, June 2001, pages 1154–1160; International Journal of Dermatology, February 2001, pages 158–159; and Journal of the American Academy of Dermatology, August 2000, pages 325–326). Psoriasis is a skin condition characterized by rapidly dividing, overactive skin cells. No one is quite sure how the Dead Sea minerals and salts affect psoriasis. One of the more popular theories regarding their benefit is that the mineral content of the water slows down the out-of-control cell division. Some research indicates that the benefit is cumulative and that the results can last for up to five months. However, there is no research showing that these minerals have any effect on wrinkles, dry skin, or acne.