Curcuminoids
The three active polyphenols in turmeric — curcumin is the most studied, but demethoxycurcumin and bisdemethoxycurcumin contribute meaningfully to the whole-spice effect.
— Definition
Curcuminoids are the family of polyphenolic pigments in turmeric (Curcuma longa). The three primary curcuminoids are: curcumin (75–80% of total curcuminoids), demethoxycurcumin (15–20%), and bisdemethoxycurcumin (3–5%).
— In Detail
Why the whole curcuminoid fraction matters: most turmeric research focuses on curcumin alone, but studies comparing isolated curcumin to whole curcuminoid extracts consistently show that the combination is more potent. Demethoxycurcumin shows superior anti-cancer activity in some models; bisdemethoxycurcumin has stronger antioxidant activity per molecule than curcumin. The three compounds act synergistically. Standard commercial turmeric powder: 2–5% total curcuminoids. Lakadong turmeric from Meghalaya's Jaintia Hills: 7–9% total curcuminoids. The Jaintia farming practice — including specific fermentation during drying — is believed to be partly responsible for this exceptional concentration. Bioavailability of curcuminoids: all three are fat-soluble and all are enhanced by piperine. The 2,000% bioavailability enhancement figure applies to the whole curcuminoid fraction, not just curcumin.
— Why It Matters
When choosing turmeric, the total curcuminoid content matters more than just curcumin percentage. Lakadong turmeric provides 3–4× the curcuminoid dose of commercial turmeric at the same quantity — which translates directly to therapeutic effect after accounting for bioavailability. This is not marketing; it is measurable chemistry.
— Related Terms
— See in Field Guide
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