Heavy Metal Poisoning: Signs, Sources, and How to Get Tested

Heavy metal toxicity, also called heavy metal poisoning, is harm to the nerves, kidneys, gut, blood and bones caused by lead, mercury, arsenic, cadmium or another toxic metal building up in the body faster than it is cleared. The most common symptoms in adults are fatigue, headaches, brain fog, abdominal pain, numbness or tingling in the hands and feet, and high blood pressure, while children more often show developmental delays, learning problems and behavior changes, and a blood or urine test matched to the suspected metal confirms the diagnosis [1].

Heavy metals are a group of naturally occurring elements that, at elevated levels in the body, can damage organs, disrupt hormones, and impair neurological function. While trace amounts of some metals (like iron, zinc, and copper) are essential for health, others, including lead, mercury, arsenic, and cadmium, serve no biological purpose and become toxic even at relatively low concentrations [1].

Heavy metal poisoning can be acute (from a single large exposure) or chronic (from repeated low-level exposure over months or years). Chronic exposure is far more common and also more difficult to diagnose, because the symptoms tend to be nonspecific. Fatigue, brain fog, digestive problems, and joint pain can all be traced to heavy metal accumulation, but they can also be attributed to dozens of other conditions.

Exposure and poisoning are not the same thing. Most people carry measurable traces of several metals from food, water and air, and a detectable level on its own is not a diagnosis. Heavy metal toxicity means a level high enough, or an exposure long enough, to cause the symptoms and organ effects described below, which is why the American College of Medical Toxicology (2017) asks clinicians to pair every test result with a careful exposure history [17].

The Four Most Common Toxic Heavy Metals

Lead

Lead is perhaps the most well-studied toxic metal. Despite regulations banning lead from gasoline and paint in the late 1970s, it remains widespread in the environment. Older homes, contaminated soil, aging water infrastructure, and certain occupations continue to be major sources [2].

Key symptoms of lead toxicity:

• Fatigue, weakness, and irritability
• Abdominal pain and constipation
• Headaches and difficulty concentrating
• Joint and muscle pain
• High blood pressure
• Memory problems
• In children: developmental delays, learning difficulties, behavioral changes

Lead is particularly dangerous for children because their developing nervous systems are more susceptible to damage, and they absorb a higher percentage of ingested lead than adults [3].

A 2021 CDC report by Ruckart and colleagues states that no safe blood lead level in children has been identified, and it lowered the CDC blood lead reference value to 3.5 µg/dL to flag children who need medical and environmental follow-up [16]. The World Health Organization's lead fact sheet makes the same point for all ages: there is no level of lead exposure known to be without harmful effects. For a symptom-by-symptom look at this one metal, see our guide to lead poisoning symptoms in adults and children, or read the lead poisoning condition overview.

Mercury

Mercury exposure occurs in three main forms: elemental (metallic), inorganic, and organic (methylmercury). Each has different sources and health effects, but all are toxic to the nervous system.

Common sources of mercury exposure:

• Fish and seafood: Large predatory fish (swordfish, shark, king mackerel, tilefish, and some tuna species) accumulate methylmercury through the food chain [4]
• Dental amalgam fillings: Silver-colored dental fillings contain approximately 50% mercury, which releases small amounts of mercury vapor over time [5]
• Industrial exposure: Coal-burning power plants, mining, and certain manufacturing processes
• Broken thermometers and fluorescent bulbs: These contain elemental mercury
• Some traditional medicines and cosmetics

Key symptoms of mercury toxicity:

• Tremors, starting with the hands
• Numbness and tingling in the extremities
• Difficulty with coordination and balance
• Memory and concentration problems
• Mood changes, anxiety, and depression
• Vision and hearing disturbances
• Metallic taste
• Kidney dysfunction

Chronic low-level mercury exposure, particularly from fish consumption or dental amalgams, is a subject of ongoing research. A study published in Environmental Health Perspectives found that even modest elevations in blood mercury were associated with subtle neurobehavioral effects in adults [6].

The joint FDA and EPA advice about eating fish sorts species by mercury content for people who are pregnant, breastfeeding or might become pregnant, and for children aged 1 to 11. It lists king mackerel, marlin, orange roughy, shark, swordfish, tilefish from the Gulf of Mexico and bigeye tuna as the choices to avoid, and salmon, sardines, shrimp, cod and canned light tuna among the lower-mercury best choices.

Arsenic

Arsenic is classified as a Group 1 carcinogen by the International Agency for Research on Cancer. Unlike some other heavy metals, arsenic exposure often comes through food and water rather than occupational contact.

Common sources of arsenic exposure:

• Drinking water: Groundwater in many regions naturally contains arsenic, particularly in parts of South Asia, Latin America, and certain areas of the United States [7]
• Rice and rice products: Rice absorbs arsenic from soil and water more readily than most other grains [8]
• Treated wood: Older pressure-treated lumber (pre-2004) was treated with chromated copper arsenate (CCA)
• Some fruit juices: Apple and grape juice can contain measurable arsenic levels
• Occupational sources: Pesticide manufacturing, smelting, and glass production

Key symptoms of arsenic toxicity:

• Skin changes: darkening, thickening, or small warts (keratoses), especially on palms and soles
• Gastrointestinal distress: nausea, vomiting, diarrhea, abdominal pain
• Numbness and tingling in hands and feet
• Fatigue
• Muscle cramping
• Chronic exposure increases cancer risk (skin, bladder, lung, kidney, liver) [7]

Arsenic toxicity is particularly insidious because chronic low-level exposure may not cause obvious symptoms for years while increasing cancer risk and cardiovascular disease [9].

The World Health Organization's arsenic fact sheet sets a provisional guideline of 10 µg/L for arsenic in drinking water and notes that skin changes, the earliest sign of long-term exposure, usually appear after about five years of drinking contaminated water. Inorganic arsenic, the form found in groundwater and rice, is far more toxic than the organic arsenic found in seafood. Households on private wells in the United States are responsible for testing their own water, because federal drinking water limits apply to public systems.

Cadmium

Cadmium is a toxic metal that accumulates primarily in the kidneys and liver, with a biological half-life of 10 to 30 years. Once it enters the body, it stays for a very long time.

Common sources of cadmium exposure:

• Cigarette smoke: Smoking is the single largest non-occupational source of cadmium exposure [10]
• Contaminated food: Leafy vegetables, root vegetables, grains, and organ meats grown in contaminated soil
• Occupational exposure: Battery manufacturing, metal plating, welding, and smelting
• Contaminated water and air near industrial sites

Key symptoms of cadmium toxicity:

• Kidney damage (proteinuria, reduced filtration rate)
• Bone loss and osteoporosis
• Respiratory problems (chronic exposure through inhalation)
• Fatigue
• Abdominal pain
• Anemia
• Increased cancer risk (lung, prostate) with chronic exposure [10]

A study in Environmental Health Perspectives demonstrated that even relatively low cadmium exposure in non-smoking adults was associated with increased risk of kidney dysfunction and bone density loss [11].

Symptoms of Heavy Metal Toxicity in Adults

The symptoms of heavy metal toxicity in adults are fatigue, headaches, brain fog, memory and concentration problems, abdominal pain, constipation or diarrhea, numbness and tingling in the hands and feet, tremor, joint and muscle pain, and high blood pressure. Which of these appear depends on the metal, the dose and how long the exposure has lasted. Lead and mercury act mainly on the brain and nerves, arsenic on the skin, gut and nerves, and cadmium on the kidneys and bones [1].

Adults usually reach a diagnosis through their exposure, not their symptoms. Painters and renovators working on pre-1978 homes, battery recyclers, welders, smelter and mining workers, indoor firing range users, people who eat large predatory fish several times a week, and people using imported traditional remedies or skin-lightening creams carry the highest risk. Lead stored in bone can also be released back into the blood during pregnancy, according to the World Health Organization, and during menopause and other periods of bone loss.

How do acute and chronic heavy metal poisoning differ?

Acute heavy metal poisoning follows one large exposure and causes severe symptoms within hours to days, often vomiting, abdominal pain, breathing trouble or confusion, and it is a medical emergency. Chronic heavy metal toxicity builds over months or years from small repeated doses and causes slower, vaguer symptoms. The table below sets out the typical pattern for each of the four metals described above.

Most adults who are tested for heavy metals have the chronic pattern, and many of their symptoms overlap with thyroid disease, anemia, sleep problems, depression and chronic fatigue syndrome. A clinician who takes a full exposure history is the most useful filter before ordering tests.

Heavy Metal Toxicity Symptoms in Kids

Heavy metal toxicity symptoms in kids are developmental delays, learning difficulties, trouble paying attention, irritability and behavior changes, loss of appetite and weight loss, tiredness, abdominal pain, vomiting and constipation, and in severe cases hearing loss or seizures. Many children with elevated blood lead levels show no obvious symptoms at all, which is why US pediatric care relies on blood lead screening rather than waiting for signs [2][3].

Children face higher risk for three reasons. They absorb more of what they swallow, up to 4 to 5 times as much lead as adults according to the World Health Organization; their brains and nervous systems are still developing; and hand-to-mouth behavior brings them into contact with lead dust, soil and paint chips. Lanphear and colleagues (2005) pooled data from seven international studies and found intellectual deficits in children at blood lead levels once considered safe [3].

Which metals matter most for children?

• Lead: The most common heavy metal problem in US children, mainly from deteriorating paint and dust in homes built before 1978, contaminated soil, older water service lines and some imported spices, toys and remedies [2].
• Mercury: Methylmercury from fish affects the developing brain most during pregnancy and early childhood, which is why the FDA and EPA fish advice covers children aged 1 to 11.
• Arsenic: Davis and colleagues (2012) found that rice intake was linked to higher urinary arsenic in US children, so rice cereals and rice drinks are worth varying with other grains [8].
• Cadmium: Secondhand cigarette smoke is the most avoidable source for children [10].

A pediatrician orders the blood lead test, and state and local health departments arrange home inspections when a child's level is above the CDC reference value [16]. Parents who suspect a sudden ingestion, for example a swallowed lead fishing weight, mercury from a broken thermometer or a mouthful of lead paint chips, should call Poison Help at 1-800-222-1222, which connects to the local US poison center.

Overlapping Symptoms: Why Heavy Metal Poisoning Is Hard to Diagnose

One of the main reasons heavy metal poisoning goes unrecognized is that the symptoms overlap significantly with many other conditions. Chronic fatigue, brain fog, digestive problems, muscle pain, and mood disturbances are common complaints in primary care settings, and heavy metal exposure is not always considered as a potential cause.

Certain patterns, however, should raise suspicion:

• Multiple system involvement: When symptoms span several organ systems (neurological, gastrointestinal, musculoskeletal) simultaneously
• Occupational or environmental risk factors: Working in construction, manufacturing, or mining, or living in an older home or near industrial sites
• Dietary patterns: High fish consumption, heavy reliance on rice-based foods, or regular use of certain herbal supplements
• Treatment resistance: Symptoms that do not respond to conventional treatments may warrant investigation for underlying toxic exposures

The reverse problem is just as common. Many people with persistent fatigue or brain fog are told they have "heavy metal toxicity" on the strength of a single unvalidated test, and miss the real cause. Our article on feeling sick when your blood work is normal covers other explanations worth ruling out, and our overview of toxic mold exposure covers another environmental cause that is often investigated alongside metals.

Testing Methods for Heavy Metals

Several testing approaches exist, each with different strengths and limitations.

Blood Testing

Blood tests measure the amount of a specific metal currently circulating in the bloodstream. They are most useful for:

• Lead: Blood lead level (BLL) is the standard test for lead exposure and reflects recent exposure (past 30 days or so) [2]
• Mercury: Whole blood mercury reflects recent exposure, especially to methylmercury from fish consumption
• Cadmium: Blood cadmium reflects more recent exposure (weeks to months)

Blood testing is widely available, standardized, and covered by most insurance plans. Its primary limitation is that it mainly captures recent exposure and may miss metals that have already redistributed into tissues and bone.

Urine Testing

Urine tests can be performed in two ways:

Unprovoked (baseline) urine: A urine sample collected without any chelation agent. This measures metals being naturally excreted and is useful for arsenic (which is primarily excreted through urine) and cadmium [12].

Provoked (challenge) urine test: A chelation agent such as DMSA, DMPS, or EDTA is administered, and urine is collected for 6 to 24 hours afterward. The chelator mobilizes metals stored in tissues, giving a picture of total body burden rather than just circulating levels.

Provoked testing is used by many functional and integrative medicine practitioners but remains controversial in conventional medicine. Critics point out that reference ranges are typically based on unprovoked samples, making interpretation of provoked results less straightforward [12]. Proponents argue that provoked testing reveals stored metals that blood and baseline urine tests miss.

The American College of Medical Toxicology, the specialty society for physicians who treat poisoning, took a clear position in its 2017 statement: post-chelator challenge urine testing has not been scientifically validated, has no demonstrated benefit and may be harmful [17]. Chelating agents raise urinary metal output in almost everyone, including healthy people with no unusual exposure, so a high provoked result cannot be compared with a normal reference range. Anyone offered a provoked test should ask how the result will be interpreted and what an unprovoked sample would add.

Hair Mineral Analysis

Hair testing involves analyzing a sample of hair (typically from the nape of the neck) for metal content. Because hair grows approximately 1 centimeter per month, a sample can provide a timeline of exposure over several months.

Hair analysis is best suited for detecting chronic exposure to mercury and arsenic. It is less reliable for lead and cadmium. External contamination (from hair products, environmental dust, or water) can affect results, so laboratories must use proper washing protocols [13].

Hair analysis is a useful screening tool but should not be relied upon as the sole diagnostic test. Results are best interpreted alongside blood and urine testing.

Which Test Should You Get?

The best approach depends on the suspected exposure:

The primary tests in the table are the ones conventional laboratories validate against reference ranges. Speciated urine arsenic separates toxic inorganic arsenic from the largely harmless organic arsenic in seafood, so many labs ask patients to avoid fish and shellfish for a few days before the sample. Blood mercury reflects methylmercury from fish, while urine mercury better reflects elemental and inorganic mercury, for example from amalgam vapor or workplace exposure. The provoked urine option in the lead row is the one the American College of Medical Toxicology advises against [17].

A functional or integrative medicine practitioner experienced in environmental medicine can help determine the most appropriate testing strategy based on your history and symptoms. Our guide to heavy metal testing compares laboratory panels, sample types and what each result can and cannot tell you.

Who Diagnoses and Treats Heavy Metal Poisoning?

Heavy metal poisoning is diagnosed and treated by primary care physicians, pediatricians, medical toxicologists, occupational medicine physicians and, for organ complications, nephrologists and neurologists. Regional poison centers, reached through Poison Help at 1-800-222-1222, advise both patients and clinicians on suspected exposures. Integrative and functional medicine physicians and naturopathic doctors also evaluate patients for metal exposure, often alongside other environmental causes of chronic symptoms.

• Primary care physician or pediatrician: Takes the exposure history, orders blood lead and other first-line tests, and refers onward.
• Medical toxicologist: A board-certified specialist in poisoning who decides whether chelation is indicated and supervises it.
• Occupational medicine physician: Handles workplace exposures, medical monitoring and return-to-work decisions under OSHA lead and cadmium standards.
• Nephrologist or neurologist: Manages kidney damage, neuropathy or cognitive effects.
• Integrative or functional medicine practitioner: Often evaluates broader environmental exposures and nutrition; ask which tests they use and whether they follow toxicology reference ranges.

Public bodies set the limits these clinicians work with: the CDC for blood lead follow-up in children, the EPA for drinking water, the FDA for food, fish advice and drug approval, OSHA for workplaces, and the International Agency for Research on Cancer for cancer classification.

Treatment Options

Treatment for heavy metal poisoning has three parts: ending the exposure, chelation therapy when blood or urine levels are high enough to justify it, and supportive care for the organs affected. For most people with chronic low-level exposure, removing the source is the main treatment, and levels fall slowly on their own. The lead poisoning condition page covers the lead-specific steps in more detail.

Remove the Source

As with any toxic exposure, the first and most important step is identifying and eliminating the source. This might mean changing dietary habits, addressing water contamination, modifying workplace practices, or removing dental amalgams (when done safely by a trained biological dentist).

The FDA recommended in 2020 that people at higher risk, including pregnant women, nursing mothers, young children and people with kidney problems or mercury sensitivity, avoid new amalgam fillings where suitable alternatives exist. The agency did not advise removing intact amalgam fillings, because drilling them out releases a short burst of mercury vapor.

Chelation Therapy

Chelation therapy uses chemical agents that bind to heavy metals in the body, forming water-soluble complexes that can be excreted through the kidneys. Common chelation agents include:

• CaNa2EDTA (calcium disodium EDTA): Effective for lead. Administered intravenously [14].
• DMSA (succimer): An oral chelation agent effective for lead and mercury. Better tolerated than older agents and commonly used in both adults and children [14].
• DMPS (unithiol): Used for mercury and arsenic. Available in both oral and intravenous forms.
• BAL (dimercaprol): Reserved for severe acute poisoning. Given by intramuscular injection.

Chelation therapy requires medical supervision because the agents can also remove essential minerals (zinc, copper, iron), stress the kidneys, and cause side effects including fatigue, headache, nausea, and mineral depletion.

The chelation therapy treatment guide explains each agent, how sessions run and what to ask before starting. For drug-specific detail, see our articles on oral DMSA chelation, intravenous EDTA chelation and the side effects of chelation therapy.

When is chelation therapy appropriate?

Chelation therapy is appropriate when a validated, unprovoked blood or urine test shows a high level of a metal that a chelator can bind, and when the exposure has been found and stopped. Medical toxicologists use CDC guidance for children and occupational guidance for adults to set those thresholds. Chelation during ongoing exposure can increase how much lead the gut absorbs, which is one reason clinicians find and remove the source first.

Chelation for other uses has weaker support. Lamas and colleagues' Trial to Assess Chelation Therapy (TACT, JAMA, 2013), funded by the National Institutes of Health, reported a modest reduction in cardiovascular events with intravenous EDTA after heart attack [18]. The follow-up TACT2 trial, published in 2024 in people with diabetes and a previous heart attack, found no reduction in death or cardiovascular events compared with placebo [19]. The CDC has also reported deaths from dangerously low calcium when edetate disodium was given in place of calcium disodium EDTA [20]. Chelation is cash pay in most integrative clinics when it is used outside confirmed poisoning, and none of the chelators are FDA approved for fatigue, autism or general detoxification.

Nutritional and Supportive Therapies

Certain nutrients support the body's natural detoxification pathways and may help reduce the impact of heavy metal exposure:

• Selenium: Has a well-documented protective effect against mercury toxicity by forming inert mercury-selenium complexes [15]
• N-acetylcysteine (NAC): Supports glutathione production, which is one of the body's primary defenses against oxidative damage from heavy metals
• Vitamin C: An antioxidant that may help reduce lead absorption and support excretion
• Zinc and iron: Adequate levels of these essential minerals reduce absorption of toxic metals through competitive binding at shared transport sites
• Fiber and chlorella: May help bind metals in the gut and promote fecal excretion, though clinical evidence is limited

These measures support, rather than replace, source removal and medically indicated chelation. Evidence for most of them comes from laboratory and small human studies, and supplements can interact with medicines, so a clinician should review doses. Our articles on glutathione and heavy metal detox protocols look at what the research does and does not show.

Lifestyle Modifications

• Sweat-inducing exercise or sauna use may support excretion of certain metals through perspiration
• Adequate hydration supports kidney function and metal excretion
• Avoiding additional exposure (filtering water, choosing low-mercury fish, not smoking)

How to Find a Clinic for Heavy Metal Testing and Chelation

Most people start with their primary care physician or pediatrician, who can order a blood lead level and refer to a medical toxicologist. People looking for an integrative or functional medicine practice can browse clinics that offer chelation therapy in the Regenerated.com directory and filter by state and city.

Regenerated.com is free for patients. Listing order is not paid ranking, Featured slots are labeled and capped, and Verified means a clinic completed our credential checks, not that it paid more. Inclusion in the directory is not an endorsement; our guide to how Featured, Verified and organic listings differ explains each label.

When you contact a clinic, ask which tests it uses and whether it orders unprovoked blood and urine tests interpreted against standard reference ranges, which agent it uses for chelation and why, who supervises infusions, how kidney function and minerals are monitored, and what the full course costs, since most of this care is cash pay.

When to See a Doctor

Consider seeking evaluation for heavy metal exposure if you experience:

• Unexplained fatigue, brain fog, or cognitive decline that persists despite adequate sleep and nutrition
• Neurological symptoms such as tremors, numbness, tingling, or coordination problems
• Gastrointestinal symptoms that do not respond to standard treatment
• Skin changes, particularly darkening or thickening of skin on hands and feet
• You have known occupational or environmental exposure risks
• You eat large predatory fish more than two to three times per week
• You have multiple dental amalgam fillings and symptoms consistent with mercury toxicity

If you are pregnant or planning to become pregnant, testing is particularly advisable, as several heavy metals cross the placenta and can affect fetal development.

Seek emergency care, or call Poison Help at 1-800-222-1222, after any suspected large exposure, such as swallowing a lead object, inhaling mercury vapor or fumes from cutting or welding painted or plated metal, or sudden vomiting, confusion, seizures or breathing trouble after a possible exposure.

Frequently asked questions

What are the first signs of heavy metal toxicity?

The first signs of heavy metal toxicity are usually vague: tiredness, headaches, trouble concentrating, irritability, abdominal pain and constipation, and numbness or tingling in the hands and feet. Arsenic often shows first as skin darkening and hard patches on the palms and soles, and mercury as a fine hand tremor. Because these early signs overlap with many common conditions, a known exposure at work, at home or in the diet is what usually prompts testing.

What are the symptoms of heavy metal toxicity in kids?

Heavy metal toxicity symptoms in kids include developmental delays, learning and attention problems, irritability, poor appetite and weight loss, tiredness, abdominal pain, vomiting and constipation, and in severe cases hearing loss or seizures. Many children with raised blood lead levels show no symptoms, so pediatricians screen with a blood lead test. The CDC flags levels at or above 3.5 µg/dL for follow-up, because no safe blood lead level in children has been identified.

Is heavy metal poisoning harmful?

Heavy metal poisoning is harmful, and the damage depends on the metal, the dose and how long exposure lasts. Lead can permanently lower a child's IQ and raises blood pressure and kidney disease risk in adults, arsenic and cadmium raise cancer risk, and mercury damages nerves and kidneys. Many symptoms ease once exposure stops and levels fall, but some effects, especially on the developing brain, can be lasting, which is why prevention and early testing matter.

What is the treatment for heavy metal poisoning?

Treatment for heavy metal poisoning starts with finding and removing the source of exposure, which is enough for many people with mild, chronic exposure. When validated blood or urine tests show high levels, a physician may prescribe chelation therapy with DMSA (succimer), calcium disodium EDTA, DMPS or BAL, chosen by metal and severity. Supportive care treats the affected organs, and adequate iron, zinc, calcium and selenium can reduce the absorption or effects of some metals.

How do I get tested for heavy metals?

Ask a primary care physician, pediatrician or occupational medicine physician to order the test that matches your suspected exposure: a blood lead level for lead, blood or urine mercury for mercury, speciated urine arsenic for arsenic, and blood or urine cadmium for cadmium. These unprovoked tests are interpreted against standard reference ranges. The American College of Medical Toxicology advises against provoked urine tests, whose results cannot be reliably compared with any normal range.

Who treats heavy metal poisoning?

Heavy metal poisoning is treated by primary care physicians and pediatricians in mild cases, and by medical toxicologists, the board-certified poisoning specialists, when chelation is being considered. Occupational medicine physicians manage workplace exposures, and nephrologists or neurologists treat kidney and nerve damage. Integrative and functional medicine clinics also offer testing and chelation, so ask which tests they use and who supervises treatment. Poison Help at 1-800-222-1222 advises on suspected exposures.

The Bottom Line

Heavy metal toxicity is damage from lead, mercury, arsenic or cadmium building up in the body. In adults it most often shows as fatigue, headaches, brain fog, abdominal pain, tingling and high blood pressure, and in children as learning, attention and behavior problems.

Heavy metal poisoning is more common than most people realize, and chronic low-level exposure is the most frequent presentation. The symptoms are often nonspecific, which means they can go undiagnosed for years.

The good news is that testing is accessible, and treatment options exist. A combination of source identification, appropriate testing (blood, urine, and/or hair analysis), chelation therapy when warranted, and nutritional support can reduce body burden, and many people's symptoms improve once the exposure ends.

If you suspect heavy metal exposure based on your symptoms, occupation, diet, or environment, getting tested is a reasonable and straightforward first step. Working with a practitioner who understands environmental medicine, and who uses validated tests, can help you navigate the testing and treatment process.

Sources

1. Tchounwou PB, Yedjou CG, Patlolla AK, Sutton DJ. “Heavy metal toxicity and the environment.” Exp Suppl. 2012;101:133-164. PMID: 22945569 ↩
2. Centers for Disease Control and Prevention. “Lead: What Do Parents Need to Know to Protect Their Children?” CDC, 2022. Available at: https://www.cdc.gov/nceh/lead/ ↩
3. Lanphear BP, Hornung R, Khoury J, et al. “Low-level environmental lead exposure and children’s intellectual function: an international pooled analysis.” Environ Health Perspect. 2005;113(7):894-899. PMID: 16002379 ↩
4. Mahaffey KR, Clickner RP, Jeffries RA. “Adult women’s blood mercury concentrations vary regionally in the United States: association with patterns of fish consumption.” Environ Health Perspect. 2009;117(1):47-53. PMID: 19165386 ↩
5. Mutter J, Naumann J, Guethlin C. “Comments on the article ‘The toxicology of mercury and its chemical compounds’ by Clarkson and Magos (2006).” Crit Rev Toxicol. 2007;37(6):537-549. PMID: 17661215 ↩
6. Yokoo EM, Valente JG, Grattan L, et al. “Low level methylmercury exposure affects neuropsychological function in adults.” Environ Health. 2003;2(1):8. PMID: 12844364 ↩
7. IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. “Arsenic, metals, fibres, and dusts.” IARC Monogr Eval Carcinog Risks Hum. 2012;100(Pt C):11-465. PMID: 23189751 ↩
8. Meharg AA, Zhao FJ. “Arsenic & Rice.” Springer, 2012. Also: Davis MA, Mackenzie TA, Cottingham KL, et al. “Rice consumption and urinary arsenic concentrations in U.S. children.” Environ Health Perspect. 2012;120(10):1418-1424. PMID: 22809585 ↩
9. Moon KA, Guallar E, Umans JG, et al. “Association between exposure to low to moderate arsenic levels and incident cardiovascular disease: a prospective cohort study.” Ann Intern Med. 2013;159(10):649-659. PMID: 24061511 ↩
10. Järup L, Akesson A. “Current status of cadmium as an environmental health problem.” Toxicol Appl Pharmacol. 2009;238(3):201-208. PMID: 19409405 ↩
11. Nawrot TS, Staessen JA, Roels HA, et al. “Cadmium exposure in the population: from health risks to strategies of prevention.” Biometals. 2010;23(5):769-782. PMID: 20517707 ↩
12. Ruha AM, Curry SC, Gerkin RD, et al. “Urine mercury excretion following meso-dimercaptosuccinic acid challenge in fish consumers.” Arch Pathol Lab Med. 2009;133(1):87-92. PMID: 19123742 ↩
13. Kempson IM, Lombi E. “Hair analysis as a biomonitor for toxicology, disease and health status.” Chem Soc Rev. 2011;40(7):3915-3940. PMID: 21468435 ↩
14. Bradberry S, Vale A. “A comparison of sodium calcium edetate (edetate calcium disodium) and succimer (DMSA) in the treatment of inorganic lead poisoning.” Clin Toxicol (Phila). 2009;47(9):841-858. PMID: 19852620 ↩
15. Ralston NV, Raymond LJ. “Dietary selenium’s protective effects against methylmercury toxicity.” Toxicology. 2010;278(1):112-123. PMID: 20561558 ↩
16. Ruckart PZ, Jones RL, Courtney JG, et al. “Update of the Blood Lead Reference Value, United States, 2021.” MMWR Morb Mortal Wkly Rep. 2021;70(43):1509-1512. DOI: 10.15585/mmwr.mm7043a4 ↩
17. American College of Medical Toxicology. “ACMT Recommends Against Use of Post-Chelator Challenge Urinary Metal Testing.” J Med Toxicol. 2017;13(4):352-354. PMCID: PMC5711755 ↩
18. Lamas GA, Goertz C, Boineau R, et al. “Effect of disodium EDTA chelation regimen on cardiovascular events in patients with previous myocardial infarction: the TACT randomized trial.” JAMA. 2013;309(12):1241-1250. PMID: 23532240 ↩
19. Lamas GA, Anstrom KJ, Navas-Acien A, et al. “Edetate Disodium-Based Chelation for Patients With a Previous Myocardial Infarction and Diabetes: TACT2 Randomized Clinical Trial.” JAMA. 2024;332(10):794-803. PMID: 39141382 ↩
20. Centers for Disease Control and Prevention. “Deaths associated with hypocalcemia from chelation therapy, Texas, Pennsylvania, and Oregon, 2003-2005.” MMWR Morb Mortal Wkly Rep. 2006;55(8):204-207. PMID: 16511441 ↩