"Natural" and "Traditional" Do Not Mean Safe: Chinese Medicine Examples
Chinese medicine examples showing why "natural" and "traditional" are not safety guarantees, from aristolochic acid and ephedra to liver injury, hidden drugs and herb-medicine interactions.
Content last updated . This page has not been medically reviewed.
Two words that do not mean "safe"
"Natural" describes where an ingredient comes from. "Traditional" describes how long it has been used. Neither tells you what a product contains, how much, or what it does alongside your medicines. The examples below come from Chinese medicine, but the same lesson applies to every herbal tradition. For the general version, see natural does not mean safe.Examples from the sources
| Example | What the source says | Lesson |
|---|---|---|
| Aristolochic acid | An FDA import alert calls it a potent carcinogen and nephrotoxin; outbreaks of kidney failure were linked to Chinese herbal medicines containing it, partly from confused traditional names [1] | A herb can be mistaken for another with a similar name |
| Ephedra (ma huang) | Long history of medicinal use in China and India; the FDA banned supplements with ephedrine alkaloids in 2004, and even low doses and short-term use have been linked to high blood pressure, heart attack, seizure, stroke and psychosis [2] | Long use did not remove the risk |
| He Shou Wu (Polygonum multiflorum) | Case reports of liver injury, including death; both processed and unprocessed forms have been reported to cause it, although TCM theory holds processing reduces toxicity [3] | A traditional safeguard did not always protect |
| Tu san qi (Gynura segetum) | A case report describes acute liver failure after about a year and a half of use as a herbal remedy; the herb is widely used in China [4] | One case is not an incidence, but a warning |
| Hidden drugs | A Hong Kong lab found undeclared drugs in 487 proprietary Chinese medicines and health products; 65.1% of patients had adverse effects, 14 severe and two fatal [5] | The label may not list everything |
| Contamination | NCCIH: products contaminated with heavy metals, pesticides, microorganisms, undeclared drugs or wrong herbs [6] | Quality varies by product |
Why tradition is not enough
Traditional use is real information about what people have done for a long time. It is not a safety trial. A rare harm such as liver injury can take thousands of users to notice, and traditional systems did not track outcomes the way modern surveillance does. The EU describes "traditional use" as use based on long-standing use and not on clinical studies. [7] The reverse is also true: a herb with a safety signal is not automatically dangerous for everyone, which is why it is asked who, which product and how much.If something goes wrong
In the US, Poison Help is 1-800-222-1222, and 911 is the emergency number. For other countries see Poison Help by country. US supplement safety concerns can be reported through the HHS Safety Reporting Portal described by NCCIH. [9]Related pages
Chinese herbs with known safety concerns, liver injury from Chinese herbs, aristolochic acid and kidney injury, and TCM safety quick reference.Frequently asked questions
Are herbs safer than medicines because they are natural?
No. Sources document kidney failure, liver injury and heart events linked to natural products. [1][3][2]
Does thousands of years of use prove safety?
No. Ephedra has a long history of use in China and India and is still banned in US supplements. [2]
Are Chinese herbal medicines tested for safety before sale?
In the US, most are sold as dietary supplements and are not reviewed by the FDA before marketing. [9]
Can I take herbs with my medicines?
Only after checking with a pharmacist or doctor; the NHS lists several common medicine types that can interact. [8]
Does this mean I should avoid all Chinese herbs?
No blanket rule follows from these examples. They show why product identity, quality, your health conditions and your medicines matter. Ask a qualified clinician.
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Who should check first
The NHS says not to take herbal medicines if you are pregnant or breastfeeding or have kidney or liver problems, and not to give them to children because not enough is known about their safety. It lists statins, antidepressants, diabetes, blood pressure, blood-thinning and hormonal contraceptive medicines as ones that may not mix well. [8] Ask a pharmacist before combining anything with a medicine, and tell your surgeon and dentist what you take.
References
- US Food and Drug Administration, Import Alert 54-10: Detention without physical examination of dietary supplements containing aristolochic acid. Read 2026-10-22.
- National Center for Complementary and Integrative Health, Ephedra. Read 2026-10-22.
- Influence Factors on the Hepatotoxicity of Polygoni Multiflori Radix. Evid Based Complement Alternat Med 2019. Read 2026-10-22.
- Gynura segetum-induced liver injury leading to acute liver failure: a case report and literature review. BMC Complement Med Ther 2022. Read 2026-10-22.
- Poon WT et al., Adulteration of proprietary Chinese medicines and health products with undeclared drugs: experience of a tertiary toxicology laboratory in Hong Kong. Br J Clin Pharmacol 2018. Read 2026-10-22.
- National Center for Complementary and Integrative Health, Traditional Chinese Medicine: What You Need To Know. Read 2026-10-22.
- European Medicines Agency, Ginseng radix: herbal medicine summary. Read 2026-10-22.
- NHS, Herbal medicines and complementary therapies. Read 2026-10-22.
- National Center for Complementary and Integrative Health, Using Dietary Supplements Wisely. 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.