Curcumin extract mostlyfrom which part of curcuma longa(tumeric)??

Question

from the leave ??stem ?? flower?? root??

Answer 1

Curcumin is extracted from the rhizoids of the plant.

Answer 2

Curcumin is mostly extracted from rhizomes of Curcuma longa:

http://www.liberherbarum.com/Pn0615.HTM

http://en.wikipedia.org/wiki/Turmeric

http://www.stii.dost.gov.ph/pjsweb/data/...