Health effects of mercury exposure The inhalation of mercury vapour can produce harmful effects on the nervous, digestive and immune systems, lungs and kidneys, and may be fatal. The inorganic salts of mercury are corrosive to the skin, eyes and gastrointestinal tract, and may induce kidney toxicity if ingested.
All Mercury is Toxic
Depending on the type and amount, exposures to mercury can damage the nervous system, kidneys, liver and immune system. Breathing mercury vapors can harm the nervous system, lungs and kidneys. Mercury vapors can pass easily from the lungs to the bloodstream.
Elemental mercury, if inhaled, can cause permanent lung damage and potential brain damage. Inorganic mercury can damage kidneys and cause blood loss. Organic mercury can damage your central nervous system (brain and spinal cord). Large amounts of mercury or long-term exposure can lead to death if not treated.
Blood mercury levels above 100 ng/mL have been reported to be associated with clear signs of mercury poisoning in some individuals (e.g., poor muscle coordination, tingling and numbness in fingers and toes).
The traditional treatment for mercury poisoning is to stop all exposures. In many cases, chelation therapy is also used. This involves giving a medication (the chelator) which goes into the body and grabs the metal (chelos is the Greek word for claw) then carries the metal out of the body, usually into the urine.
Foods with sulfur: Foods rich in sulfur, like garlic and broccoli, may help with removing toxic metals. Supplements like selenium, alphalipoic acid and glutathione may also help with mercury toxicity.
When you breathe in mercury vapors, however, most (about 80%) of the mercury enters your bloodstream directly from your lungs, and then rapidly goes to other parts of your body, including the brain and kidneys. Once in your body, metallic mercury can stay for weeks or months.
There's no cure for mercury poisoning. The best way to treat mercury poisoning is to limit your exposure to the metal. If you eat a lot of mercury-containing seafood, a doctor may caution you to stop immediately.
Symptoms of mercury poisoning. Symptoms of mercury poisoning depend on the form of the mercury that was the source of the exposure. Early symptoms of mercury poisoning can include a metallic taste in the mouth and numbness and tingling in the hands, feet and face.
These recommendations are based on EPA guidance and estimates of mercury in the most popular canned tunas: Canned white, or albacore (0.32 parts per million of mercury). Children under six can eat up to one 3-ounce portion a month; children from 6-12, two 4.5-ounce portions a month.
Other consumer products: Metallic mercury is often found in school laboratories. It is also in some thermometers, barometers, switches, thermostats, and electrical switches. View a list of products that contain mercury.
The biological half-life of mercury is estimated to be approximately 30 to 60 days in the body [4]. The half-life of mercury in the brain is not entirely clear, but is estimated to be as long as approximately 20 years.
If it is swallowed, like from a broken thermometer, it mostly passes through your body and very little is absorbed. If you touch it, a small amount may pass through your skin, but not usually enough to harm you.
Salmon is low in mercury.
Both wild and farmed Atlantic salmon have much lower mercury levels than most other fish species. Farmed salmon has on average, 0.05 micrograms of mercury per gram.
King mackerel, marlin, orange roughy, shark, swordfish, tilefish, ahi tuna, and bigeye tuna all contain high levels of mercury. Women who are pregnant or nursing or who plan to become pregnant within a year should avoid eating these fish. So should children younger than six.
According to the FDA, since salmon mercury content is so low, you can safely eat two to three servings per week of salmon and feel no harmful effects.
A substance that binds to heavy metals is known as a chelator, and the process that transports them out of the body is called chelation. People may also refer to a heavy metal detox as chelation therapy. Doctors use specific chelator medications to treat heavy metal poisoning.
The Dietary Guidelines for Americans states that to consume those higher amounts, children should only be fed fish from the “Best Choices” list that are even lower in mercury – these fish are anchovies, Atlantic mackerel, catfish, clams, crab, crawfish, flounder, haddock, mullet, oysters, plaice, pollock, salmon, ...
How do I know if I have heavy metal poisoning? Doctors can usually check for heavy metal poisoning with a simple blood test known as a heavy metals panel or heavy metal toxicity test. To do the test, they'll take a small blood sample and test it for signs of heavy metals.
Thirty-two studies, out of 40 testing memory in individuals exposed to inorganic mercury, found significant memory deficits. Some autopsy studies found increased mercury levels in brain tissues of AD patients.
Mercury metal have many applications. Because of its high-density, mercury is used in thermometers, barometers, manometers, sphygmomanometers, float valves, mercury switches, mercury relays, fluorescent lamps and other devices.
Mercuric mercury does not pass the blood brain barrier and, consequently, it is not distributed as such into the brain. Amalgam fillings not only release elemental mercury vapor, but they also corrode and release corrosion products [41].
Mercury can be used to make thermometers, barometers and other scientific instruments. Mercury conducts electricity and is used to make silent, position dependent switches. Mercury vapor is used in streetlights, fluorescent lamps and advertising signs.
Though tuna is very nutritious, it's also high in mercury compared to most other fish. Therefore, it should be eaten in moderation — not every day. You can eat skipjack and light canned tuna alongside other low-mercury fish a few times each week, but should limit or avoid albacore, yellowfin and bigeye tuna.