Turmeric
Curcuma longa
The golden rhizome at the centre of Ayurvedic practice, and the single most researched culinary botanical of the last two decades.
What the research says
Curcumin is the principal active compound, studied extensively for anti-inflammatory activity. It is poorly absorbed alone; piperine from black pepper slows its clearance dramatically.
Brewing tip
Always brew turmeric with a pinch of black pepper and a little fat or milk if you want absorption.
Questions
Why is absorption a problem?+
Curcumin is metabolised and cleared very quickly. Piperine is the simplest fix.
Will it stain?+
Yes. Use glass or steel rather than light plastic.