EcoWatch: Toxicologists have a saying: The dose makes the poison. In other words, there is no such thing as toxic or non-toxic--it always depends on how much of a substance you consume.
So whats a toxic level of mercury in your diet? This has long been a concern, because many fish contain measurable levels of mercury, which can cause profound neurological disease and death if consumed in sufficient amounts. The issue gained new urgency last week when a study in the journal Nature showed that mercury...