I had a bad run-in with arsenic about 25-years ago. I had worked 4½-years at a busy lumber yard, where about ¼ of the lumber I handled was "pressure treated"- saturated with arsenic. At that time, it was very popular to build outdoor furniture, patio decks, railing, etc. from pressure treated lumber, because it's weather- and rot-resistant. I understand, since that time, building codes have been altered to restrict its use, particularly in residential applications. Late in my tenure there, I noticed I was feeling chronically ill. Hardly a day would go by that I didn't feel nauseated, and I couldn't figure out why, until I realized the lumber was impregnated with arsenic. Even though we wore protective gloves, etc., it's impossible to stay isolated from it. If you handle enough of it, it goes right through your clothing, gets dusted in your hair, in your ears, and so on. I noticed everyone who worked there had medical problems of one sort or another. I finally decided we were being slowly poisoned and quit the job.
The thing about arsenic is, once it builds up in your body, it tends to stay there. For many years after leaving the lumber yard, I continued to have chronic ailments- nothing super-serious- mainly skin rashes that, again, I couldn't account for. In the early 2000's, I read about a 3-year old little boy who had suffered with many ailments. His parents had taken him to doctor after doctor, with no success. In desperation, they took him to an holistic healer, who ran blood-tests, and discovered he had an elevated level of arsenic. Apparently, his folks had built a pressure treated wooden deck in their yard, where the boy often played on his hands and knees, and was absorbing the stuff through his skin. The doctor put him on a controlled regimen of selenium- an antioxidant- which was effective at purging the arsenic from his body. Within a few short months, he was healthy again. Reading this reminded me of all the arsenic I had been exposed to, so I went straight to the pharmacy, bought some over-the-counter selenium tabs and began taking them. CAUTIONARY NOTE: using selenium must be done with EXTREME caution. Too much selenium can produce very serious side-effects, including the weakening of the bones and the loss of your teeth. This is why many people living in Appalachia are toothless, because of the abnormally high levels of selenium in their water supplies. I don't share this experience to encourage anyone to self-medicate, but to provide information that may be shared with health-care professionals, like a doctor. Please be careful using selenium. Long story short: my rashes quickly began to subside, then vanished, and I haven't been bothered by them since.
I know this doesn't relate directly to arsenic in rice; nevertheless, there are other ways besides diet by which we can amass toxins. If you have a pressure treated wooden porch, lawn chairs, etc.- especially if they were made several years ago- you may be at risk of absorbing high levels of arsenic.
Sorry, I'm not really trying to change the subject.