It seems the fish we've been encouraged to eat may contain arsenic. We usually just worry about drinking water, whether here in the US where I am, or, for example, in Bangladesh where tens of millions of people daily drink water contaminated with dangerous levels of arsenic from geologic sources. I wonder:
- How prevalent is this arsenic in fish?
- What are its sources?
- Is it harmful to humans and other animals in this form?
- Is this a new phenomenon or has it always been this way?
- Do people who eat such fish as part of their daily lifestyle or culture have health consequences?
- Are those consequences good or bad?
- Do such arsenic compounds protect us from the arsenic?