How mercury is bad for you?

Mercury has no value to the human body and is best thought of as poison. The effects of mercury exposure vary depending on the form and level of exposure. Acute exposure to mercury vapor can produce serious effects on the nervous system including psychotic reactions, hallucinations, suicidal tendencies and delirium. read more

Perhaps mercury is combined with some other element to make it non poisonous. it seems to me that even a small bit of mercury would kill you if it were that bad. read more

Mercury exposure is particularly dangerous for children and pregnant women. You'll want to limit your intake to fish with lower levels of mercury - avoid albacore and swordfish - and eat no more than six ounces a week. Canned tuna is generally lower in mercury; you may be able to go up to 12 ounces a week. read more