Cross-ref. Turmeric (Curcuma longa) contains 2-8% curcuminoids by weight. Standardized extracts provide concentrated curcumin. and curcumin-extended.md for bioavailability forms and drug interactions. --- *Reviewed by the Dose AI Research Team and Clinical Advisory Board* *Last updated: 2026-04-06*
Based on independent third-party laboratory analysis
Category pass rate: 76% pass rate — 24% of products fail. Additionally, 47% of Bangladesh-sourced turmeric contains intentionally-added lead.
Contamination risk: HIGH. 47% of Bangladesh turmeric has intentionally-added lead (lead chromate) to enhance yellow color. Always check country of origin.
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.
Safety
Moderate interactions. Monitoring, timing separation, or dose adjustment may be required.
Warfarin and other anticoagulants
Curcumin has antiplatelet properties.
Source: Clinical pharmacology
Aspirin and NSAIDs
Additive antiplatelet and GI effects.
Source: Clinical consensus
Diabetes medications (metformin, sulfonylureas)
Curcumin lowers blood glucose.
Source: PMID: 34956436
CYP3A4 substrates
Curcumin inhibits CYP3A4 in vitro.
Source: In vitro data
Tacrolimus or cyclosporine
CYP3A4 inhibition may raise levels.
Source: Theoretical
Stop 2 weeks before surgery
High-dose antiplatelet effect.
Educational information only. This is not medical advice. These statements have not been evaluated by the FDA. Talk to your prescriber before starting, stopping, or combining any supplement with prescription medication.