human
I've heard that there are many benefits to eating fish, but I'm worried about mercury poisoning.
assistant
Mercury is a naturally occurring element found in the environment and in some foods. It is also used in industry as a preservative and in medicine. The EPA has set guidelines for safe levels of exposure to methylmercury, which is the form of mercury that can be absorbed through the skin. These guidelines recommend that children under the age of 6 should not consume more than two ounces (about the size of a deck of cards) per week. Adults should limit their intake to one ounce per week.