Supplement evidence

036 / 575Botanical

Turmeric/curcumin

View my plan →

The short answer

Some formulations modestly improve osteoarthritis pain.

Evidence and scope: Mixed evidence
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: Bioavailability and product differences prevent broad anti-inflammatory or longevity conclusions.
Before deciding: Concentrated products can cause liver injury, GI symptoms, gallbladder problems, or drug interactions.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

Joint symptoms500–1,000 mg/day curcuminoids in many short trials; formulations are not equivalent

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityFat-soluble / lipid-based

Fat-soluble or lipid-based. Absorption generally improves with a meal containing fat.

How it is commonly taken

Take with food; enhanced-absorption formulations substantially change exposure.

Do not combine casually

Piperine can alter medicine levels; anticoagulants, gallstones, liver injury, and surgery require caution.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

4research papers in this ledger

4unique primary studies represented

236unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2023

Safety signalPMID 36252717

Liver injury associated with turmeric: ten cases from the Drug-Induced Liver Injury Network

Nine cases were hepatocellular, five required hospitalization, and one patient died. This establishes a rare but potentially severe safety signal, not its incidence.

Published: 2023n=10 participants

Study design and methods

Design: Prospective-network case series with expert causality adjudication and product analysis
Population: 10 U.S. patients with adjudicated turmeric-associated liver injury
Intervention: Turmeric supplements; three of seven tested products also contained piperine
Outcome: Clinical pattern, hospitalization, death, product chemistry, and HLA association

Study period: 2004–2022

Funding or conflict note: The authors declared no competing interests; the network was supported by NIH grants.

Open research record ↗

2021

Supports a specific usePMID 35010916

An investigation into the effects of a curcumin extract on osteoarthritis pain of the knee

Pain scores and some function measures improved more with the tested extract, while other performance tests did not. The result is short-term and product-specific.

Published: 2021Duration: 8 weeksn=101 participants

Study design and methods

Design: Randomized double-blind placebo-controlled trial
Population: 101 adults with knee osteoarthritis
Intervention: Standardized Curcugen extract 500 mg twice daily versus placebo
Outcome: Knee pain, function, walking tests, and pain-medicine use

Funding or conflict note: The product company supported the study; one author was company-affiliated and another reported nutraceutical-industry relationships.

Open research record ↗

2015

Evidence contextPMID 25618800

Antioxidant and anti-inflammatory effects of curcuminoid-piperine combination in metabolic syndrome

Several biomarkers improved, but the trial did not test symptoms, disease events, or longevity; biomarker changes alone do not establish a clinical benefit.

Published: 2015Duration: 8 weeksn=117 participants

Study design and methods

Design: Randomized double-blind placebo-controlled trial
Population: 117 adults with metabolic syndrome
Intervention: Curcuminoids 1 g/day plus piperine 10 mg/day versus placebo
Outcome: C-reactive protein and oxidative-stress biomarkers

Open research record ↗

1998

Evidence contextPMID 9619120

Influence of piperine on the pharmacokinetics of curcumin in human volunteers

Piperine markedly increased short-term curcumin exposure. This pharmacokinetic result does not prove greater clinical benefit and makes piperine-containing formulations non-equivalent to plain curcumin.

Published: 1998n=8 participants

Study design and methods

Design: Small human pharmacokinetic crossover study
Population: Eight healthy volunteers completing the human analysis
Intervention: Curcumin 2 g alone or with piperine 20 mg
Outcome: Serum curcumin concentration and bioavailability

Funding or conflict note: A commercial ingredient supplier prepared study capsules and was represented among the authors.

Open research record ↗

Unscreened discovery appendix—not evidence1,085 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewNational Center for Complementary and Integrative Health Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.