Traditional Chinese Medicine: Practice System, Product, and Evidence Are Different

The Short Answer: Evidence for One Part of TCM Does Not Cover the Rest

Traditional Chinese medicine (TCM) is not one thing you can test. It is a long-running system of practice that includes several approaches, and each approach has its own evidence. The U.S. National Center for Complementary and Integrative Health (NCCIH) says acupuncture and tai chi may help certain pain conditions and quality of life, while studies of Chinese herbal products have had mixed results.

So a good question is not “Does TCM work?” A better one is: “Which practice, which product, and which evidence am I talking about?”

By NewEasternHealth.com Research Team. Updated September 24, 2026.

Safety First: When to Get Help Right Away

If you or someone else has trouble breathing, chest pain, a severe allergic reaction, or you think someone has swallowed something harmful, call your local emergency number now. Do not wait to look up information online.

NCCIH also says not to use TCM to replace or delay conventional care. For any ongoing health concern, keep your regular health care provider involved.

Three Different Things People Call “TCM”

• The practice system: NCCIH describes TCM as having evolved over thousands of years. Practitioners use psychological and physical approaches, such as acupuncture and tai chi, along with herbal products.
• The individual practice: Acupuncture (stimulating body points, usually with thin needles) and tai chi (gentle movement, breathing, and focus) are separate methods. Each has its own research.
• The product in your hand: A specific herbal product is a physical item with its own ingredients and manufacturing history. Those may differ from what a study tested.

The Evidence Ladder: Where Each Part Stands

This ladder is our own way of organizing what NCCIH reports. It is a reading aid, not a ranking of which approach is “better.”

1. Rung 1: The whole system. NCCIH says the approaches within TCM have been the subject of many clinical studies and scientific reviews. In our reading, that means the evidence has to be checked for each approach, not for TCM as a single package.
2. Rung 2: Acupuncture. Some studies suggest real acupuncture may help ease certain chronic pain, such as low-back pain, neck pain, knee osteoarthritis pain, and carpal tunnel syndrome. It may also reduce the frequency of tension headaches and help prevent migraine. NCCIH also notes that some trials found real and sham (fake) acupuncture equally effective, which points to a possible placebo effect.
3. Rung 3: Tai chi. Research suggests tai chi may improve balance in older people and people with Parkinson's disease. It may also reduce knee osteoarthritis pain and help people cope with fibromyalgia and back pain. NCCIH says tai chi and qigong appear to be safe practices, with minor aches and pains possible.
4. Rung 4: Chinese herbal products. These have been studied for many problems, including stroke, heart disease, mental disorders, and respiratory diseases. NCCIH says many studies were of poor quality, so no firm conclusions can be made about how well they work.
5. Rung 5: The exact product you are holding. NCCIH reports that some Chinese herbal products have been contaminated or have contained undeclared or incorrect ingredients. Because of that, a study of one herbal product does not automatically apply to another bottle or brand.

The main lesson: good evidence on one rung does not carry up or down to another.

Known Versus Unknown

What NCCIH says is known

• Acupuncture and tai chi have been studied, with encouraging results for some pain conditions and other outcomes.
• Herbal product studies have had mixed results, and many were low quality.
• Some Chinese herbal products have been found to contain undeclared plant or animal material. Others contained drugs such as warfarin (a blood thinner) and diclofenac (a pain reliever), heavy metals such as arsenic, lead, and cadmium, pesticides, or sulfites, which can trigger asthma or severe allergic reactions.
• Manufacturing errors, such as one herb mistakenly replacing another, have caused serious complications. Some incorrect herbs have caused organ damage.
• Relatively few complications from acupuncture have been reported, but nonsterile needles and improper delivery have caused serious harm, including infections and punctured organs.

What is not settled

• Whether most Chinese herbal products work for the conditions they have been studied for. NCCIH says no firm conclusions can be made.
• How much of acupuncture's benefit comes from the needling itself versus placebo effects, since some trials found real and sham acupuncture equally effective.
• What is actually in a particular herbal product. NCCIH's reports of undeclared ingredients suggest the label alone may not tell the whole story.

Note on dates: The NCCIH TCM overview lists April 2019 as its last update. Check NCCIH for newer pages before relying on any single detail.

A Practical Checklist: Questions to Prepare

This checklist helps you prepare questions. It does not tell you what to do, and it is not a substitute for advice from your own health care provider.

Before you go further with any TCM approach

• Which part am I asking about: the whole system, one practice, or one product?
• What does a trusted source say about that specific part?
• Have I told all my health care providers about the complementary approaches I use or am considering? NCCIH advises this.
• Am I using this to replace or delay conventional care? NCCIH advises against that.

If you are considering acupuncture

• What are the practitioner's training and experience? NCCIH advises asking.
• Does my state regulate acupuncture? NCCIH says most states and the District of Columbia have laws, and most states require certification from the National Certification Commission for Acupuncture and Oriental Medicine.
• Are the needles sterile? Nonsterile needles and improper treatment are linked to serious complications.

If you are considering an herbal product

• Have I talked with my health care provider first? NCCIH advises this if you have a health condition.
• Is there an NCCIH Herbs at a Glance fact sheet for the herb? The series covers common names, what the science says, side effects, and cautions.
• Could this product interact with medicines I take? NCCIH links to a guide on herb-drug interactions from its Herbs at a Glance page.
• What does the label list, and can my health care provider help me understand it?

If you are pregnant, nursing, or thinking about TCM for a child

• NCCIH says to be especially sure to consult your (or the child's) health care provider first.
• Pregnant women should also talk with their providers before starting tai chi, qigong, or any exercise program.

How to Read Claims You See Online

• “Used for thousands of years.” This describes history. It does not show that a product works or is safe today.
• “Studied in clinical trials.” Ask which practice or product, in whom, and how good the studies were. NCCIH notes many herbal studies were poor quality.
• “Natural, so safe.” NCCIH's reports of contamination, undeclared drugs, and herb mix-ups show why “natural” is not the same as safe.

For more on how we weigh different kinds of evidence, see The Evidence File and Our Standards.

Sources

• NCCIH: Traditional Chinese Medicine: What You Need To Know
• NCCIH: Herbs at a Glance

Educational Disclaimer and Site Identity

This article is general educational information. It is not medical advice, diagnosis, or treatment, and it does not recommend any product, practitioner, or service. Talk with a qualified health care provider about your own situation.

NewEasternHealth.com is an independent publication, not a medical practice, clinic, or healthcare provider. It has no relationship with the former operators of this domain. See the Non-Affiliation Notice. Last updated September 24, 2026.