Measures the toxic heavy metals most relevant to exposure in venous blood, lead, mercury, arsenic, and cadmium, alongside zinc.
The Heavy Metals panel measures four toxic metals, lead, mercury, arsenic and cadmium, alongside zinc, an essential mineral that interacts with them. It is aimed at adults with possible exposure through water, seafood, older housing, work or hobbies, and at anyone who wants a baseline before chasing symptoms like fatigue or brain fog.
Metals almost never appear on a routine physical, so most people have never seen these numbers. The sections below explain what each marker reflects, how the sample is collected, how to prepare and what the results can and cannot show.
This panel measures lead, mercury, arsenic, cadmium and zinc, four metals the body has no biological use for and one mineral it depends on daily. Research reviews describe these metals as widespread environmental contaminants that reach people through water, food, air, dust and occupational contact, with effects that depend on the chemical form, the dose and the length of exposure 1.
| Group | Marker | What it shows |
|---|---|---|
| Toxic Metals & Minerals | Lead (Pb), whole blood | Circulating lead, reflecting recent and ongoing exposure from older paint and plumbing, contaminated soil or dust, some imported goods, and certain trades and hobbies |
| Toxic Metals & Minerals | Mercury (Hg), whole blood | Circulating mercury, largely from methylmercury in fish and shellfish, with inorganic forms possible in some occupational settings |
| Toxic Metals & Minerals | Arsenic (As), urine total | Recent arsenic intake from drinking water, certain foods including rice products, seafood and industrial sources, combining organic and inorganic forms |
| Toxic Metals & Minerals | Cadmium (Cd), whole blood | Exposure from tobacco and secondhand smoke, some plant foods grown in cadmium-rich soil, and industrial dust |
| Toxic Metals & Minerals | Zinc (Zn) | Status of an essential mineral that shares absorption and transport pathways with cadmium and lead |
Laboratories report each result with its own units and its own typical reference range, and those ranges vary by laboratory, by sample type, by age and by sex. Read your own report against the range printed beside each result rather than a number taken from an article.
These five markers are grouped because they share exposure routes and biological pathways, so one result often helps explain another. Reviews of metal toxicity describe overlapping mechanisms across lead, mercury, cadmium and arsenic, including oxidative stress, interference with enzyme function and displacement of essential metals from the proteins that need them 2. Research also suggests these metals can influence metabolic signalling, which is one reason they are of interest to people working on body composition and energy 3.
Lead (Whole Blood) is the classic marker for housing-related and occupational exposure, and research links it mainly to neurological, renal and cardiovascular pathways 4. Mercury (Whole Blood) reflects a very different exposure story, since most circulating mercury in adults who do not work with the metal comes from methylmercury in seafood, and the toxicology of mercury differs sharply between its organic and inorganic forms 5. Arsenic (Urine Total) is collected in urine because arsenic clears quickly through the kidneys, and urine is the sample type reviews describe as reflecting recent intake. Cadmium (Whole Blood) is included because cadmium accumulates in the kidney over years and is associated with renal and bone effects in long-term exposure 7. Zinc sits alongside them because zinc and cadmium compete biologically, and a low zinc result changes how a clinician reads the rest of the group.
Seen together, the pattern is more informative than any single value. Elevated arsenic with a seafood-heavy diet reads differently from elevated arsenic with well water, and a borderline cadmium result reads differently in people with a long smoking history.
People usually look at this panel when something in their environment, their history or their symptoms raises the question of exposure. That includes adults who drink from a private well, live in or renovate housing built before modern paint and plumbing rules, eat large predatory fish often, or work in or around welding, soldering, battery work, foundries, construction, firing ranges, ceramics, stained glass, auto body work or electronics repair. Hobbies count as much as jobs.
Family or household context matters too. Shared water, shared soil and shared dust mean exposure is rarely a solo event, and people often test after a relative or a workplace screening returns an unexpected result. Smokers and former smokers sometimes test because cadmium is associated with tobacco smoke.
Others come to it from the symptom side, looking into persistent fatigue, headaches, brain fog, tingling in the hands or feet, poor sleep, hair changes or stubborn body composition. Those symptoms have many possible explanations and metals are only one of them, so a panel like this is best understood as ruling a question in or out rather than as an answer. A baseline is also simply useful. Knowing your numbers now makes any future result far easier to interpret.
You order the panel online, FitScript emails your requisition, and you take it to a Quest or partner lab location, with sites available nationwide. The blood markers come from a standard venous draw, and the arsenic marker is collected as a urine specimen at the same visit, following the collection instructions printed on your requisition.
Metals are measured on specialised instrumentation, so the sample is handled differently from a routine chemistry panel, including the use of metal-free collection tubes. The turnaround and any fasting instructions are listed in the panel details on this page.
When results post, Atlas, FitScript's AI health advisor, reads every marker against optimal ranges and explains what each value reflects in plain language, alongside the laboratory's own reference range. Add-on panels can be run from the same sample, which is worth knowing if you are already planning other testing. Interpretation is the start of a conversation with a clinician, not a replacement for one.
Preparation for this panel is mostly about avoiding things that can shift a result for reasons unrelated to your usual exposure. Follow any fasting instruction listed in the panel details on this page, and drink water normally in the hours before your visit so the draw is straightforward and the urine specimen is easy to provide.
Seafood is the single biggest preparation issue. Fish and shellfish contain organic arsenic compounds that laboratories regard as far less concerning than inorganic arsenic, but they still raise a total urine arsenic result, which is why many laboratories ask for a seafood pause before collection 6. Follow the instruction printed on your requisition rather than guessing.
Supplements deserve a quick review as well. Zinc supplements taken shortly before the draw can influence a zinc result, and high dose biotin is known to interfere with some immunoassay-based tests that people often run in the same visit, so mention anything you take to the lab staff and to your clinician. Herbal products, seaweed, kelp, colloidal mineral products and some imported remedies may contain metals, and disclosing them helps interpretation.
Keep taking any prescribed medication as directed unless your own clinician tells you otherwise. Do not stop or adjust a prescription to prepare for a blood test.
Read each result against two things, the laboratory's standard reference range and the optimal range Atlas applies, and remember that optimal ranges are FitScript's optimization targets rather than diagnostic cut-offs. A standard range describes what is commonly seen in a reference population. An optimal range is a narrower target used for tracking and goal-setting. A value outside the standard range is best described as suboptimal or outside the standard range, and it is worth discussing with a clinician promptly rather than filing away.
Timing matters because each marker has its own window. Blood lead and blood mercury largely reflect recent and ongoing exposure, urine arsenic reflects intake over the preceding days, and blood cadmium reflects recent exposure against a body burden that accumulates in the kidney over many years. That is why one panel is a snapshot. A single mildly elevated mercury after a holiday of sushi is a different signal from the same value repeated across seasons.
The useful sequence is observation, then meaning, then next step. The observation is the number and its units. The meaning is hedged, since a result may reflect diet, water, work, hobbies or an unidentified source. The next step is a conversation with a licensed clinician who can take an exposure history, decide whether to repeat the collection, consider other testing and determine whether any intervention is appropriate. Retesting cadence is a clinical decision, and it usually follows a change in the suspected exposure rather than a fixed calendar.
This panel cannot diagnose metal toxicity, identify where an exposure came from, or tell you what a metal has done inside an organ. It measures what is circulating or excreted at one moment, and no single value establishes a condition.
Blood and urine also sit at a distance from stored metal. Reviews describe cadmium concentrating in renal tissue and lead exchanging with bone over long periods, so a circulating value does not map neatly onto total body burden. The panel also does not separate the chemical species of each metal, which matters most for arsenic, where total urine arsenic combines forms that differ greatly in toxicology 6.
It does not assess the organ systems most studied in relation to these metals. Kidney function, liver enzymes, blood counts, nerve conduction, bone density and imaging all require their own testing, and research associates arsenic with renal injury pathways and mercury with neurological and immune effects, none of which a metals panel measures directly 8 9 10. Cadmium research has also examined endocrine signalling and carcinogenic mechanisms, which are questions for a clinician and not for a single lab value 11 12. Any decision about further investigation or therapy belongs to a licensed provider who has reviewed you.
This panel answers an exposure question, while the sibling panels answer function and nutrition questions, so they overlap very little. Organ Health looks at how the kidneys, liver and other systems are performing, which is the natural companion question when a metals result prompts a clinician to look at organ function. Longevity Nutrients focuses on nutrient status, which is useful context because mineral status and metal handling interact in the body.
A metals panel tells you what is present. An organ panel tells you how the system is working. A nutrient panel tells you what the system has to work with. Members on a FitScript membership build the fuller picture over time, with 150+ biomarkers tested per year, and add-on panels can run from the same sample at a single visit.
The current price, turnaround and any fasting instructions are listed in the panel details on this page. The panel is HSA/FSA eligible.
Urine testing captures metals your body is actively excreting, giving a better picture of recent and ongoing exposure. Blood testing only shows what's currently circulating, which can be normal even with significant tissue accumulation. Urine is the standard for comprehensive heavy metal screening.
Mercury: seafood (especially tuna, swordfish), dental amalgams. Lead: old paint, water pipes, imported ceramics. Arsenic: rice, groundwater, treated wood. Cadmium: cigarette smoke, chocolate, leafy greens from contaminated soil. Aluminum: antiperspirants, cookware, antacids.
Atlas AI identifies which metals are elevated and suggests evidence-based approaches: source reduction (the most important step), targeted binders, and supportive supplements. Severe elevations may warrant discussion with a provider about chelation therapy.
You'll receive a collection kit with instructions. It's a first-morning urine sample, no fasting required, no special preparation. The kit includes a prepaid shipping label to send directly to the lab.
A heavy metal toxicity test measures how much of specific metals is circulating in blood or being excreted in urine at the time of collection. It does not diagnose toxicity on its own. A clinician combines the numbers with your exposure history, symptoms and other testing before drawing any conclusion.
Yes. A blood test for lead and mercury is standard, because both metals are measured in whole blood using metal-free collection tubes. Blood lead and blood mercury mainly reflect recent and ongoing exposure rather than metal stored in bone or tissue, which is why timing and repeat testing matter.
This heavy metal panel tests for lead, mercury, arsenic and cadmium, plus zinc, an essential mineral that shares absorption and transport pathways with cadmium and lead. Lead, mercury and cadmium are measured in whole blood, and total arsenic is measured in a urine specimen collected at the same visit.
Follow the fasting instruction listed in the panel details on this page and on your emailed requisition, since preparation varies by collection. Water is generally encouraged so the draw and the urine specimen are straightforward. Keep taking prescribed medication as directed unless your own clinician advises otherwise.
Seafood contains organic arsenic compounds that laboratories regard as far less concerning than inorganic arsenic, but a total urine arsenic measurement counts both. Eating fish or shellfish shortly before collection can therefore raise the number without reflecting a problematic exposure. Follow the seafood instruction printed on your requisition.
A result outside the standard range is described as suboptimal, not as a diagnosis, and it is worth discussing with a clinician promptly. The clinician takes an exposure history, may repeat the collection and may add organ function or other testing before deciding whether anything further is appropriate.
No. The panel shows what is circulating or being excreted, not the source. Identifying a source relies on history, such as water supply, housing age, diet, tobacco smoke, occupation and hobbies, and sometimes on environmental testing of water, soil or dust that sits outside bloodwork entirely.
Retesting cadence is a clinical decision rather than a fixed calendar. It usually follows a meaningful change, such as a new water source, a job or hobby change, or stopping smoking. A licensed clinician decides when repeating the panel adds useful information for your situation.
Zinc is included because it is an essential mineral that competes biologically with cadmium and lead for absorption and transport, so zinc status changes how the other results are read. Zinc supplements taken close to collection can influence the value, so mention them to the lab and your clinician.