Look for extracts "standardized to 95% curcuminoids." This ensures a high concentration of the active ingredients, compared to raw powder which may only contain 3–6% curcumin.
Curcumin is poorly absorbed by the body on its own. Effective capsules include: buy turmeric capsules online
Can increase absorption by up to 2,000% . Look for extracts "standardized to 95% curcuminoids
High-quality brands will provide evidence of testing for heavy metals (like lead) and purity through certifications from organizations like NSF , USP , or ConsumerLab . or ConsumerLab .