Kristin wants to read this: Arsenic can be used to treat Selenium poisoning. Selenium can be used to treat Arsenic poisonimng. So, obviously, great care is needed. Can still save lives. 1. Excellent list of references on the subject http://phys4.harvard.edu/~wilson/arsenic/as-sn.html 2. Selenium Treatment of Arsenic Toxicity & Cancers in Bangladesh [SETAC] Includes links to clinical trial protocol. In conjunction with Institute of child and mother health (Bangladesh), Texas Tech university, University of Chicago, American Cancer Society, Apollo Hospitals (Dhaka). + Photos and other documents. http://www.bangladesh-selenium.org/ The "Dermlite" epiluminescence" system is fascinating - text description of this is not evident on site , but from the photos it appears that skin luminescence when excited by suitable wavelength LEDs (UV?) can be used to show that poisoning is present !!! (May be being used to show the presence of the bound As-Se compound (based on unexplained diagram)). Russell _________________________________________________ >From 1st ref above Arsenic / Selenium Interactions In 1938, Moxon discovered that arsenic protected against selenium toxicity. Since that time it has been shown that this protective effect of arsenic against selenium poisoning can be demonstrated in many different animal species under a wide variety of conditions. Antagonistic effects between arsenic and selenium have also been noted in teratologic experiments. - Orville A. Levander, 1971 Arsenic has been used to prevent or cure selenium poisoning in those exposed to selenium. It has been suggested that the reverse might be useful - using selenium to prevent or cure arsenic poisoning. But caution is in order. To carefully redress a selenium deficiency in the deed is one thing; to give unrestricted access to selenium may well replace one hazard by another. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist