Cnicus benedictus Identity & Plant Part
The botanical entity is Cnicus benedictus L., an annual thistle-like herb of the Asteraceae family, a plant now placed by some databases under Centaurea benedicta. The part used is the aerial portion: leaves, stems and flowering heads cut above ground. Roots and seed are not part of this ingredient.
The common name is the main hazard. Blessed thistle, also called holy thistle, is not milk thistle, which is Silybum marianum and a different plant with a different seed-based supply chain. It is also unrelated to the cotton thistle and the ornamental thistles of the genus Cirsium.
Blessed thistle herb carries a bitter sesquiterpene lactone called cnicin, together with lignans, flavonoids and tannins.
Blessed thistle herb is easy to recognize in the dried state by its coarse, prickly, whitish-hairy leaves, which is a physical identity check that precedes any extraction.












