Turmeric

Safety information

Toxicity: Culinary/extract amounts likely safe ~2-3 months; nausea, reflux, GI upset; topical curcumin can cause hives/itching. High-bioavailability curcumin formulations have caused liver injury (DILIN, Halegoua-DeMarzio 2023, PMID 36252717); some linked to piperine-enhanced products. | Mild — occasional skin rash. | Spice doses safe. High-dose supplements linked to drug-induced liver injury (DILIN case series; LiverTox), some products adulterated. | Culinary turmeric well tolerated. High-dose concentrated curcumin supplements (often with absorption enhancers such as piperine) linked to idiosyncratic acute liver injury - recognized cause of herb-induced liver injury in pharmacovigilance and LiverTox. | Low; GRAS as a spice. High-dose curcumin supplements: GI upset; rare hepatotoxicity case reports with high-dose/enhanced-absorption products.

Contraindications: Supplements possibly unsafe in pregnancy. Caution in liver disease, gallstones/bile-duct obstruction, or on hepatotoxic drugs. | Professional advice if on blood-thinning medication or with gallstones. | Liver disease (high-dose supplements); gallstones; pre-surgery (antiplatelet at high doses). | Pre-existing liver disease and high-dose supplement use; gallstones/biliary obstruction (cholagogue); pregnancy at medicinal/supplement doses (uterine-stimulant theory - culinary amounts fine); discontinue supplements before surgery. | Gallstones/bile-duct obstruction (stimulates bile); active hepatic disease (high-dose extracts); before surgery (bleeding risk); iron-deficiency (chelates iron). Caution in pregnancy at medicinal/supplement doses (culinary amounts acceptable).

Interactions: Consult provider; theoretical effects on drug-metabolizing enzymes; piperine co-formulation raises systemic exposure of curcumin and possibly co-administered drugs (CYP3A4/P-gp substrates). | Anticoagulants (additive); gallstone caution. | Possible additive antiplatelet; may affect drug metabolism at supplement doses. | Possible potentiation of anticoagulant/antiplatelet drugs; piperine (in combined products) inhibits drug metabolism/transport and can raise levels of co-administered drugs; possible additive antidiabetic effect. | Anticoagulants/antiplatelets (bleeding), antidiabetics (additive), piperine markedly increases absorption of curcumin and many co-administered drugs (CYP3A4/P-gp inhibition).

Pregnancy & breastfeeding: Supplements possibly unsafe in pregnancy. | Culinary amounts fine; caution at medicinal/supplement doses (uterine-stimulant theory). | Caution at medicinal/supplement doses; culinary amounts considered acceptable.