USP wants warnings on green tea extracts, black cohosh

July 2, 2007

The new labeling requirements came about after the USP reviewed numerous case reports suggesting a potential link between ingestion of products containing green tea extracts and black cohosh and liver damage.

The U.S. Pharmacopeia (USP) Dietary Supplement Information Expert Committee has voted to require cautionary statements on the labels for green tea extracts and black cohosh dietary supplements. The new labeling requirements came about after the USP reviewed numerous case reports suggesting a potential link between ingestion of products containing green tea extracts and black cohosh and liver damage. The cautionary statement for green tea extracts will appear in Pharmacopeial Forum for public comment as a revision to the initial USP proposal of the monograph "Powdered Decaffeinated Green Tea Extract." The cautionary statement for black cohosh is scheduled to appear in September 2007 as a proposed Interim Revision Announcement in Pharmacopeial Forum 33 (5) for 60-day public comment.

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