Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Oldenlandia diffusa

Botanical

Useful mainly for traditional use within TCM formulas; no proven standalone clinical benefit.

Quick decision guide

May help most

traditional use within TCM formulas; no proven standalone clinical benefit

Common dosing range

Not standardized; used as a decoction or extract in traditional practice

When to expect effects

Not characterized

Watch out for

Marketed for cancer but human evidence is preliminary and it should never replace oncology care

What is it

Oldenlandia diffusa (also classified as Hedyotis diffusa), known as bai hua she she cao, is a herb used in traditional Chinese medicine, often in formulas aimed at "clearing heat" and as an adjunct in cancer care. Its laboratory-studied constituents include iridoids, flavonoids, and anthraquinones, but clinical evidence in humans is very limited.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if

It is part of a clinician-supervised traditional formula and you accept unproven status

Probably skip if

You are seeking a proven cancer treatment or want to substitute it for medical care
You are pregnant or breastfeeding
You want reliable dosing and outcome data

Evidence at a glance

anticancer and immune-modulating activity

Mixed Evidence
Effect
Not established in humans
Best fit
not defined by clinical data
Time
Not characterized

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

anticancer and immune-modulating activity

Mechanism only
Mixed Evidence

Cell-culture and animal studies report that Oldenlandia diffusa extracts can inhibit tumor-cell growth and modulate immune activity, which underlies its traditional use as a cancer adjunct. There are no rigorous controlled human trials, so any anticancer benefit in people is unproven and it must not replace standard treatment.

Effect size
Not established in humans
Time to effect
Not characterized
Best fit
not defined by clinical data

Bottom line: Preclinical anticancer signals only — not a proven therapy and no substitute for oncology care.

How to take it

1. Typical dose
No standardized clinical dose; traditionally used as a decoction within formulas
2. Timing
As directed in a formula
3. With food
Either

What to track

nothing validated; use only alongside, never instead of, medical care

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

not well characterized in humans

Who should avoid it

Pregnancy & breastfeeding

Avoid in pregnancy and breastfeeding due to lack of safety data.

Interactions

immunosuppressant drugsModerate

Possible immune-modulating effects could interfere

chemotherapyModerate

Unknown interactions; use only under oncology supervision

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for

correct botanical identity (Hedyotis/Oldenlandia diffusa)
sourcing and contaminant testing

Be skeptical of

cancer-cure or tumor-shrinking claims
any claim it can replace medical treatment

References by claim

anticancer and immune-modulating activity

Han et al., 2020PubMed (2020) link

Kim et al., 2026PMC (2026) link

Safety

Memorial Sloan Kettering — Oldenlandia diffusaMSKCC About Herbs link

Track Oldenlandia diffusa with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.