# Testing and guidance, explained

Source page: https://intrinsicprism.com/learn

Clear guides to the test, your options, and what comes after a result.

[Explore the test](https://intrinsicprism.com/learn/intrinsic-prism-test)

## Start with your question

Choose a guide for the decision in front of you. These resources connect our testing-and-guidance package with a dated comparison of other offers and an explanation of the next steps.

## Popular tests

Each page covers one topic; all three sell the same all-in-one 133+ marker test.

[**Mold toxicity (mycotoxin) test**

29 mold toxins in urine, with a home-test vs body-test explainer.](https://intrinsicprism.com/tests/mold-mycotoxin-test)[**Heavy metal test**

20 metals in urine, including mercury, lead, arsenic and cadmium.](https://intrinsicprism.com/tests/heavy-metal-test)[**Environmental toxin test**

Metals, mold toxins, plastics, pesticides, VOCs and PFAS in one at-home test.](https://intrinsicprism.com/tests/environmental-toxin-test)

## Three guides, different jobs

Read the product guide for what our package includes, the comparison for a side-by-side view of selected offers, and the results guide for interpretation and follow-up.

[**The Intrinsic Prism test**

At-home testing, a connected report, and personalized next steps in one package.](https://intrinsicprism.com/learn/intrinsic-prism-test)[**Compare toxin testing options**

Compare the actual offer: what is measured, how samples are collected, and what support follows.](https://intrinsicprism.com/learn/compare-toxin-tests)[**Your results and next steps**

Read the measurement, understand the context, and make a plan for what comes next.](https://intrinsicprism.com/learn/understanding-results-and-next-steps)

## Topic guides

Criteria-based guides to choosing a test by question. Options are listed alphabetically, not ranked. Last updated: October 18, 2026.

[**Best at-home toxin test**

How to choose an at-home toxin test: compare categories, sample types, ordering route and HSA/FSA across seven providers, with dated sources.](https://intrinsicprism.com/learn/best-at-home-toxin-test)[**Best at-home heavy metal test**

How to choose an at-home heavy metal test: urine vs blood vs hair, which metals are covered and ordering, with CDC, ATSDR and EPA sources.](https://intrinsicprism.com/learn/best-at-home-heavy-metal-test)[**At-home mycotoxin test**

How at-home urine mycotoxin tests work, how panels differ (11 to 31 mycotoxins), and what CDC, EPA and FDA say about mold and mycotoxins.](https://intrinsicprism.com/learn/at-home-mycotoxin-test)[**Microplastics and plastic chemicals test**

Can you test for microplastics at home? What BPA and phthalate urine tests actually measure, how options compare, and what FDA, CDC and NIEHS say.](https://intrinsicprism.com/learn/microplastics-plastic-chemicals-test)[**PFAS test at home**

How to test for PFAS at home, blood vs urine options, which panels include PFAS, and what ATSDR, EPA and NIEHS say a PFAS result can and cannot tell you.](https://intrinsicprism.com/learn/pfas-test-at-home)[**Total toxin burden test explained**

What a total toxin burden test is, how panels from Intrinsic Prism, Mosaic and US BioTek differ, how to read marker counts, and what results mean.](https://intrinsicprism.com/learn/total-toxin-burden-test)[**Are at-home toxin tests legit?**

What urine, blood and DNA tests can measure, their real limitations, how to judge any lab and when to see a doctor instead.](https://intrinsicprism.com/learn/are-at-home-toxin-tests-legit)[**Order the Intrinsic Prism test**

$1,999 per participant: what's included, the five marker groups, shipping, refunds and how to order.](https://intrinsicprism.com/buy)

## More topic guides

Question-led guides added October 19, 2026, each with dated sources.

[**How to test for mold toxicity**

Body tests vs home tests: urine mycotoxin panels, mold-allergy blood tests and moisture checks, with CDC and EPA guidance.](https://intrinsicprism.com/learn/how-to-test-for-mold-toxicity)[**Where to get tested for mold toxicity**

Your clinician, practitioner-ordered labs, direct-to-consumer kits and international availability.](https://intrinsicprism.com/learn/where-to-get-tested-for-mold-toxicity)[**ERMI vs urine mycotoxin test**

Home dust DNA index vs body testing: what each measures and what EPA says about ERMI.](https://intrinsicprism.com/learn/ermi-vs-urine-mycotoxin-test)[**Are mycotoxin urine tests accurate?**

Measurement vs meaning, detection in healthy people, and why methods and units differ between labs.](https://intrinsicprism.com/learn/are-mycotoxin-urine-tests-accurate)[**What a positive mycotoxin test means**

Exposure vs illness, food vs building sources, and sensible next steps.](https://intrinsicprism.com/learn/positive-mycotoxin-test-meaning)[**Mycotoxin test cost**

What drives mycotoxin test cost, our package price and HSA/FSA, checked October 2026.](https://intrinsicprism.com/learn/mycotoxin-test-cost)[**Heavy metal test cost**

What drives heavy metal test cost, ordering routes, our package price and HSA/FSA, checked October 2026.](https://intrinsicprism.com/learn/heavy-metal-test-cost)[**Provoked vs unprovoked heavy metal test**

Post-chelator urine testing and what the American College of Medical Toxicology advises.](https://intrinsicprism.com/learn/provoked-vs-unprovoked-heavy-metal-test)[**Glyphosate urine test**

What a glyphosate urine test shows, how common detection is in NHANES, and what IARC and EPA say.](https://intrinsicprism.com/learn/glyphosate-urine-test)[**Benzene and VOC exposure test**

Breath vs urine metabolites for benzene and other VOCs, and what the markers mean.](https://intrinsicprism.com/learn/benzene-voc-exposure-test)[**How to prepare for a urine toxin test**

First-morning urine, water, foods to avoid, fasting, medications and provocation.](https://intrinsicprism.com/learn/how-to-prepare-for-urine-toxin-test)[**Does insurance cover toxin testing?**

Insurance, HSA and FSA for toxin tests, with IRS and CDC sources.](https://intrinsicprism.com/learn/does-insurance-cover-toxin-testing)[**Can you use an HSA or FSA for a toxin test?**

IRS qualified medical expense rules, letters of medical necessity and what to check first.](https://intrinsicprism.com/learn/hsa-fsa-eligible-toxin-test)[**How to test for PFAS, glyphosate and phthalates at home**

Which sample measures each chemical (blood for PFAS, urine for glyphosate and phthalates) and what results can and cannot show.](https://intrinsicprism.com/learn/how-to-test-for-pfas-glyphosate-phthalates-at-home)[**Is there one test for heavy metals, mold toxins and chemicals?**

Which at-home tests list all three categories in one order, what each includes and the samples needed.](https://intrinsicprism.com/learn/one-test-heavy-metals-mold-toxins-chemicals)

## Buying guides for 2027

Early buying guides for people planning testing in 2027, built on provider pages re-checked November 3, 2026. Options are described, not ranked.

[**Best at-home total toxin burden test for 2027**

An early 2027 buying guide: categories, samples, lab quality and HSA/FSA across combined toxin tests, with sources checked November 3, 2026.](https://intrinsicprism.com/learn/best-at-home-toxin-test-2027)[**Best at-home heavy metal test for 2027**

Which metals, urine or blood, lab quality and ordering route for heavy metal tests, with sources checked November 3, 2026.](https://intrinsicprism.com/learn/best-at-home-heavy-metal-test-2027)[**Best at-home mycotoxin test for 2027**

Body vs home testing, panel size, method and ordering for urine mycotoxin tests, with sources checked November 3, 2026.](https://intrinsicprism.com/learn/best-at-home-mycotoxin-test-2027)[**Best PFAS test at home for 2027**

How many PFAS, blood vs urine, and what a PFAS result can and cannot tell you, with sources checked November 3, 2026.](https://intrinsicprism.com/learn/best-pfas-test-at-home-2027)[**Best plastic chemicals (BPA / phthalates) test for 2027**

Which bisphenols and phthalates each test lists, and why these tests measure chemicals rather than microplastics, with sources checked November 3, 2026.](https://intrinsicprism.com/learn/best-plastic-chemicals-test-2027)

## Limits and guidelines

Official limits and rules, added October 2026, each with cited government sources.

[**Limits and guidelines hub**

Official limits and rules in one place, each figure linked to its government source.](https://intrinsicprism.com/learn/limits)[**PFAS drinking-water limits by US state and country**

EPA rule and 2026 proposals, state MCLs, EU, Canada, Australia and WHO, in ng/L (ppt).](https://intrinsicprism.com/learn/limits/pfas-drinking-water-limits)[**Glyphosate residue limits (MRLs) by country**

EU, US, Canadian and Australian limits for common crops, in mg/kg.](https://intrinsicprism.com/learn/limits/glyphosate-mrls)[**Mold disclosure and remediation rules by US state**

Federal position plus landlord and licensing rules in six states.](https://intrinsicprism.com/learn/limits/mold-disclosure-remediation-rules)[**Official mold cleanup and remediation guidelines**

EPA, NYC and state health department guidance, with current links for moved documents.](https://intrinsicprism.com/learn/mold-cleanup-guidelines)[**VOCs in household products**

Household sources, CARB and EPA consumer-product VOC rules, and how exposure is measured.](https://intrinsicprism.com/learn/vocs-in-household-products)

## Marker guides and common questions

Added October 2026. Each page cites primary sources.

[**Toxin marker guides**

33 guides to individual markers: sample, sources of exposure, health concerns and limits, cited to agency sources.](https://intrinsicprism.com/learn/markers)[**How do you know if you have toxins in your body?**

How biomonitoring works, what CDC national survey data show, and what a blood or urine result can and cannot tell you about chemicals in your body.](https://intrinsicprism.com/learn/how-to-know-if-you-have-toxins-in-your-body)[**Can a blood test detect toxins?**

Which toxins a blood test can detect, which are better measured in urine, and what each sample reflects, by chemical class, cited to ATSDR, CDC and EFSA.](https://intrinsicprism.com/learn/can-a-blood-test-detect-toxins)[**Do microplastics affect testosterone?**

What peer-reviewed studies show about microplastics and testosterone: animal findings, human tissue studies, and why association is not causation.](https://intrinsicprism.com/learn/microplastics-and-testosterone)[**How much does a PFAS test cost?**

How much a PFAS blood test costs: Intrinsic Prism $1,999 for a five-category package, checked October 2026.](https://intrinsicprism.com/learn/pfas-test-cost)[**Is a mycotoxin test worth it?**

Who a urine mycotoxin test can help, what it cannot tell you, and why a suspected moldy building needs its own assessment, cited to WHO, EFSA, CDC and EPA.](https://intrinsicprism.com/learn/is-a-mycotoxin-test-worth-it)[**Can my doctor order a mycotoxin test?**

Whether a doctor can order a urine mycotoxin test, how that differs from a mold allergy blood test, and in-clinic vs at-home options, checked October 2026.](https://intrinsicprism.com/learn/can-my-doctor-order-a-mycotoxin-test)[**The most comprehensive toxin test**

What “comprehensive” means: categories vs marker counts, with 11 tests compared across six categories.](https://intrinsicprism.com/learn/most-comprehensive-toxin-test)[**Pesticide test at home**

Eight pesticide and four herbicide urine markers, and why most are class-level, not product-specific.](https://intrinsicprism.com/learn/pesticide-exposure-test)

## Reference

Sourced statistics, a marker glossary and shipping information.

[**How our test is measured**

ICP-MS for heavy metals, LC-MS/MS for mold toxins and chemicals including PFAS, and creatinine-corrected urine results.](https://intrinsicprism.com/learn/testing-methodology)[**How results are interpreted**

NHANES and 1,000-adult reference ranges, and how to read the three percentile bands.](https://intrinsicprism.com/learn/reference-ranges)[**Toxin exposure statistics**

33 sourced statistics on mold, glyphosate, BPA, PFAS, metals and indoor air.](https://intrinsicprism.com/learn/toxin-exposure-statistics)[**Toxin marker glossary**

Plain-English guide to the 133+ markers, grouped by category.](https://intrinsicprism.com/learn/toxin-marker-glossary)[**Shipping and delivery**

Where we ship, how availability is confirmed at checkout, returns and customs.](https://intrinsicprism.com/shipping)

## Topic statistics

Added October 2026. Sourced statistics for four exposure topics, spun out of our toxin exposure statistics page.

[**PFAS statistics**

Blood levels, NHANES trends since 1999, NASEM thresholds, tap water findings and drinking water limits.](https://intrinsicprism.com/learn/pfas-statistics)[**Mold and mycotoxin statistics**

Damp-home health risk, humidity and drying guidance, mold sensitization, food limits and ochratoxin A in urine.](https://intrinsicprism.com/learn/mold-mycotoxin-statistics)[**Microplastics statistics**

Particles in blood, arteries, brain and testes, nanoplastics in bottled water, and BPA and phthalate trends.](https://intrinsicprism.com/learn/microplastics-statistics)[**Heavy metals statistics**

Lead deaths and blood lead reference value, arsenic in groundwater, mercury and testing guidance.](https://intrinsicprism.com/learn/heavy-metals-statistics)[**Household toxin exposure estimator**

Free, educational 18-question quiz: which everyday exposures are more likely for you, with sources and tips.](https://intrinsicprism.com/tools/household-toxin-exposure-estimator)

## PFAS in tap water

Added October 2026. Based on EPA’s final UCMR 5 data for public water systems, with a page for every state, DC and Puerto Rico.

[**PFAS tap water ZIP code lookup**

See EPA UCMR 5 results for the public water systems that serve a ZIP code.](https://intrinsicprism.com/tools/pfas-water-lookup)[**PFAS in US tap water 2026**

What EPA’s final UCMR 5 data show: 10,312 systems, 29 PFAS, state ranking and downloads.](https://intrinsicprism.com/learn/pfas-in-tap-water-2026)[**Territories and tribal systems**

UCMR 5 results for U.S. territories and tribal water systems.](https://intrinsicprism.com/learn/pfas-tap-water/territories-and-tribal-systems)

By state: [Alabama](https://intrinsicprism.com/learn/pfas-tap-water/alabama) · [Alaska](https://intrinsicprism.com/learn/pfas-tap-water/alaska) · [Arizona](https://intrinsicprism.com/learn/pfas-tap-water/arizona) · [Arkansas](https://intrinsicprism.com/learn/pfas-tap-water/arkansas) · [California](https://intrinsicprism.com/learn/pfas-tap-water/california) · [Colorado](https://intrinsicprism.com/learn/pfas-tap-water/colorado) · [Connecticut](https://intrinsicprism.com/learn/pfas-tap-water/connecticut) · [Delaware](https://intrinsicprism.com/learn/pfas-tap-water/delaware) · [District of Columbia](https://intrinsicprism.com/learn/pfas-tap-water/district-of-columbia) · [Florida](https://intrinsicprism.com/learn/pfas-tap-water/florida) · [Georgia](https://intrinsicprism.com/learn/pfas-tap-water/georgia) · [Hawaii](https://intrinsicprism.com/learn/pfas-tap-water/hawaii) · [Idaho](https://intrinsicprism.com/learn/pfas-tap-water/idaho) · [Illinois](https://intrinsicprism.com/learn/pfas-tap-water/illinois) · [Indiana](https://intrinsicprism.com/learn/pfas-tap-water/indiana) · [Iowa](https://intrinsicprism.com/learn/pfas-tap-water/iowa) · [Kansas](https://intrinsicprism.com/learn/pfas-tap-water/kansas) · [Kentucky](https://intrinsicprism.com/learn/pfas-tap-water/kentucky) · [Louisiana](https://intrinsicprism.com/learn/pfas-tap-water/louisiana) · [Maine](https://intrinsicprism.com/learn/pfas-tap-water/maine) · [Maryland](https://intrinsicprism.com/learn/pfas-tap-water/maryland) · [Massachusetts](https://intrinsicprism.com/learn/pfas-tap-water/massachusetts) · [Michigan](https://intrinsicprism.com/learn/pfas-tap-water/michigan) · [Minnesota](https://intrinsicprism.com/learn/pfas-tap-water/minnesota) · [Mississippi](https://intrinsicprism.com/learn/pfas-tap-water/mississippi) · [Missouri](https://intrinsicprism.com/learn/pfas-tap-water/missouri) · [Montana](https://intrinsicprism.com/learn/pfas-tap-water/montana) · [Nebraska](https://intrinsicprism.com/learn/pfas-tap-water/nebraska) · [Nevada](https://intrinsicprism.com/learn/pfas-tap-water/nevada) · [New Hampshire](https://intrinsicprism.com/learn/pfas-tap-water/new-hampshire) · [New Jersey](https://intrinsicprism.com/learn/pfas-tap-water/new-jersey) · [New Mexico](https://intrinsicprism.com/learn/pfas-tap-water/new-mexico) · [New York](https://intrinsicprism.com/learn/pfas-tap-water/new-york) · [North Carolina](https://intrinsicprism.com/learn/pfas-tap-water/north-carolina) · [North Dakota](https://intrinsicprism.com/learn/pfas-tap-water/north-dakota) · [Ohio](https://intrinsicprism.com/learn/pfas-tap-water/ohio) · [Oklahoma](https://intrinsicprism.com/learn/pfas-tap-water/oklahoma) · [Oregon](https://intrinsicprism.com/learn/pfas-tap-water/oregon) · [Pennsylvania](https://intrinsicprism.com/learn/pfas-tap-water/pennsylvania) · [Puerto Rico](https://intrinsicprism.com/learn/pfas-tap-water/puerto-rico) · [Rhode Island](https://intrinsicprism.com/learn/pfas-tap-water/rhode-island) · [South Carolina](https://intrinsicprism.com/learn/pfas-tap-water/south-carolina) · [South Dakota](https://intrinsicprism.com/learn/pfas-tap-water/south-dakota) · [Tennessee](https://intrinsicprism.com/learn/pfas-tap-water/tennessee) · [Texas](https://intrinsicprism.com/learn/pfas-tap-water/texas) · [Utah](https://intrinsicprism.com/learn/pfas-tap-water/utah) · [Vermont](https://intrinsicprism.com/learn/pfas-tap-water/vermont) · [Virginia](https://intrinsicprism.com/learn/pfas-tap-water/virginia) · [Washington](https://intrinsicprism.com/learn/pfas-tap-water/washington) · [West Virginia](https://intrinsicprism.com/learn/pfas-tap-water/west-virginia) · [Wisconsin](https://intrinsicprism.com/learn/pfas-tap-water/wisconsin) · [Wyoming](https://intrinsicprism.com/learn/pfas-tap-water/wyoming) · [Territories and tribal systems](https://intrinsicprism.com/learn/pfas-tap-water/territories-and-tribal-systems).

## Provider comparisons

Side-by-side, source-linked comparisons of Intrinsic Prism and other providers, including when another option may fit better. Last updated: October 18, 2026.

[**Intrinsic Prism vs Mosaic Diagnostics**

A dated comparison of Intrinsic Prism and Mosaic Diagnostics (formerly Great Plains Laboratory) EnviroTOX, MycoTOX and TOXDetect panels: markers, sample and ordering.](https://intrinsicprism.com/learn/intrinsic-prism-vs-mosaic-diagnostics)[**Intrinsic Prism vs US BioTek**

Intrinsic Prism compared with US BioTek MOE-Tox Complete: toxin-specific counts shown separately from organic acids, sample type and ordering.](https://intrinsicprism.com/learn/intrinsic-prism-vs-us-biotek)[**Intrinsic Prism vs Doctor's Data**

Intrinsic Prism compared with Doctor's Data urine, hair and blood elements testing: metals covered, other toxin categories, sample and ordering.](https://intrinsicprism.com/learn/intrinsic-prism-vs-doctors-data)[**Intrinsic Prism vs Quicksilver Scientific**

Intrinsic Prism compared with Quicksilver Scientific Blood Metals Panel and Mercury Tri-Test: metals, sample type, state access and ordering.](https://intrinsicprism.com/learn/intrinsic-prism-vs-quicksilver-scientific)[**Intrinsic Prism vs Million Marker**

Intrinsic Prism compared with the Million Marker Exposure Test: bisphenols, phthalates and parabens, sample, HSA/FSA and state availability.](https://intrinsicprism.com/learn/intrinsic-prism-vs-million-marker)[**Intrinsic Prism vs RealTime Labs**

Mycotoxins covered, method, sample, HSA/FSA and ordering.](https://intrinsicprism.com/learn/intrinsic-prism-vs-realtime-labs)[**Intrinsic Prism vs Genova Diagnostics**

Toxic Element Clearance, DetoxiGenomic and NutrEval compared with a five-category package.](https://intrinsicprism.com/learn/intrinsic-prism-vs-genova)[**Intrinsic Prism vs EquiLife**

Environmental Toxicity and Glyphosate tests compared on markers, sample and coaching.](https://intrinsicprism.com/learn/intrinsic-prism-vs-equi-life)[**Intrinsic Prism vs empowerDX**

The empowerDX PFAS Exposure blood test compared on PFAS, sample and HSA/FSA.](https://intrinsicprism.com/learn/intrinsic-prism-vs-empowerdx)[**Intrinsic Prism vs Everlywell**

The discontinued Everlywell Heavy Metals Test compared on markers and sample type.](https://intrinsicprism.com/learn/intrinsic-prism-vs-everlywell)

## Keep the result in context

CDC describes a chemical measurement in blood or urine as evidence of exposure, not proof by itself that it causes disease or an adverse effect.[[8]](#source-8)

Our FAQ likewise explains that a result flag does not establish a diagnosis, exposure source or treatment on its own.[[2]](#source-2)

## About these guides

Prepared by Intrinsic Prism. Our own offering appears in the comparison, so it is not an independent ranking. Each guide identifies its sources and their capture dates. These pages are educational and do not provide individual medical advice.

## Sources and dates

Prepared and published 2026-09-22. Retained-source dates below are capture dates, not new retrievals.

1. [[2] FAQ | Intrinsic Prism](https://intrinsicprism.com/faq) Captured 2026-09-22. Current required collector snapshot.
2. [[8] About the National Exposure Report | National Exposure Report | CDC](https://www.cdc.gov/environmental-exposure-report/about/index.html) Captured 2026-09-13. Reused September 13 public-health capture, not refetched this cycle.