Imported and Traditional Medicine Products: Safety Reports and Respectful Caution
What testing and case reports found about metals and undeclared drugs in some imported Ayurvedic and Chinese herbal products, and a respectful way to ask questions about them.
Content last updated . This page has not been medically reviewed.
Safety first
Lead, mercury and arsenic poisoning can look like other illnesses. A 2025 review of published cases found that the metal cause "often remained unrecognized for a long time". [1] If someone has unexplained tiredness, stomach pain or anemia and uses a traditional or imported product, tell a clinician about the product and bring the package. A US state health report on one lead poisoning case began with fatigue and shortness of breath. [2] For a child who may have swallowed a product, or for collapse, seizure or trouble breathing, call 911; Poison Help in the US is 1-800-222-1222. See Poisoning: What to Do First.This page is about products, not traditions
Ayurveda is, in NCCIH's words, "one of the world's oldest medical systems" and remains one of India's traditional health care systems. [3] The safety reports below concern particular products that were tested or that caused harm, usually through how they were made, sourced, imported or sold. They are not a verdict on a tradition or on the practitioners who work within it. The sources we read do not measure how many products or practitioners avoid these problems.What the sources report
These are research and regulator findings about product safety. They are not claims that any product treats a condition.| Question | What the source found | Strength of evidence |
|---|---|---|
| Do some Ayurvedic products contain metals? | NCCIH states some Ayurvedic preparations "may contain lead, mercury, or arsenic in amounts that can be toxic", and that FDA warns metals in some products make them potentially harmful. [3] | Summary from a national research agency |
| How common was it in internet-sold products? | A 2008 JAMA study bought Ayurvedic medicines from websites in 2005. Of 193 analyzed, 20.7% had detectable lead, mercury or arsenic; all of those exceeded one or more standards for acceptable daily intake. [4] | Product survey at one time point; may not reflect products today |
| Does the preparation type matter? | In that study, "rasa shastra" medicines (herbs combined with metals, minerals and gems) more often contained metals than other products (40.6% vs 17.1%). [4] | Same survey |
| Has this caused real poisoning? | A 2015 US state health report describes a 64-year-old woman with high blood lead and anemia, linked to Ayurvedic medications purchased on the internet. [2] | Single case report |
| How many cases are published overall? | A 2025 review found 210 patient cases (102 case reports, 30 case series) of metal poisoning from traditional or alternative medicines. Most products came from Asia and were mainly contaminated with lead and arsenic. It reported higher sensitivity in children than adults. [1] | Review of case reports; cannot give rates |
| What about Chinese herbal products? | NCCIH reports some have been contaminated with toxic compounds, heavy metals, pesticides and microorganisms, and that mistaken herb substitution has caused serious complications. [5] | Summary of reports and studies |
| Undeclared drugs? | NCCIH says some Chinese herbal products were found contaminated with drugs such as warfarin and diclofenac. [5] | Reports; not a rate |
A regulator example: after a heavy-metal poisoning report, Health Canada tested products seized from a clinic selling unauthorized Ayurvedic products. It found high levels of arsenic, mercury or lead in 14 of 15 samples, and three products also contained prescription drugs. [6]
"Imported" and "unauthorized"
Health Canada states that unauthorized health products "have not been assessed by Health Canada for safety, effectiveness and quality." [6] FDA warns of products ordered direct from overseas sources by mail, which can bypass normal Customs and FDA inspections. [7] The sources we read do not say every imported product is a problem; the risk they describe is that nobody has checked a particular product.Who is most at risk
Health Canada's advisory says children, pregnant women and breastfeeding women are most susceptible to the toxic effects of these metals. [6] A case review also reported greater sensitivity in children. [1] Undeclared drugs such as warfarin can also interact with prescribed medicines; see How Interactions Work.What a reader can safely do
- Tell your clinician and pharmacist exactly what you use, including traditional medicines. See how to tell your doctor without feeling judged.
- Ask the practitioner or supplier how a product is sourced and tested, and whether a laboratory report exists. Treat any certificate as one piece of information; see what testing seals show.
- Keep the packaging and any lot number. For testing results across product types see Heavy Metals in Supplements and Herbal Products.
- For the traditions themselves, see Adulteration and Undeclared Drugs in Ayurvedic Products and Adulteration and Substitution in Chinese Herbal Products.
- Do not stop or change a prescribed medicine on your own; ask the prescriber or pharmacist.
Limits of what we could verify
Proper evidence not found for a current overall contamination rate across imported traditional products. We searched PubMed, NCCIH and regulator alert pages. The studies above are older or small, and testing methods differ between them.Frequently asked questions
Does this mean Ayurvedic or Chinese medicine is unsafe?
No. The sources report problems with specific products, mostly contamination, substitution or undeclared drugs. NCCIH separately notes that studies of Chinese herbal products for many conditions have had mixed results. [5]
Are US-made products free of metals?
Not necessarily. In the 2008 internet survey, 21.7% of US-made and 19.5% of Indian-made Ayurvedic products had detectable metals, a difference that was not statistically significant. [4]
What are signs of lead poisoning?
Health Canada lists abdominal pain, anemia, changes in blood pressure, weakness, concentration problems, and kidney and brain damage among the effects of lead. [6] A clinician can order a blood lead test; the case report above used one. [2]
Can a "natural" label guarantee a product is free of drugs?
No. NCCIH reports Chinese herbal products found to contain warfarin and diclofenac that were not declared. [5]
Where do I report a problem product?
References
- Gerke L, Seifert R. Lead and arsenic intoxications by traditional and alternative medicine: men are more sensitive than women. Naunyn-Schmiedeberg's Archives of Pharmacology. 2025;398(1):799-818. Read 2026-10-22 (abstract).
- Meiman J, Thiboldeaux R, Anderson H. Lead Poisoning and Anemia Associated with Use of Ayurvedic Medications Purchased on the Internet, Wisconsin, 2015. MMWR. 2015;64(32):883. Read 2026-10-22.
- National Center for Complementary and Integrative Health (NIH). Ayurvedic Medicine: In Depth. Read 2026-10-22.
- Saper RB, et al. Lead, mercury, and arsenic in US- and Indian-manufactured Ayurvedic medicines sold via the Internet. JAMA. 2008;300(8):915-923. Read 2026-10-22 (abstract).
- National Center for Complementary and Integrative Health (NIH). Traditional Chinese Medicine: What You Need To Know. Read 2026-10-22.
- Health Canada. Public advisory: products sold by an Ayurvedic clinic in Toronto, ON, may pose serious health risks (update of 2022-02-01). Read 2026-10-22.
- U.S. Food and Drug Administration. 6 Tip-offs to Rip-offs: Don't Fall for Health Fraud Scams (content current as of 2021-03-04). Read 2026-10-22.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.