Maricel Maffini, consultant and Tom Neltner, Chemicals Policy Director
This blog is the third in our Broken GRAS series where we explore how the Food and Drug Administration’s Generally Recognized as Safe (GRAS) voluntary notification system for novel chemicals added to food works in practice and why it is broken.
In this blog, we examine another voluntary GRAS notice submitted to the FDA, this one for Venetron, an extract of Apocynum venetum leaves. It is marketed for sleep improvement and anti-stress and used as a dietary supplement and food ingredient. Documents obtained through a Freedom of Information Act (FOIA) request reveal that FDA scientists raised safety concerns about Venetron. Under the broken GRAS system, however, the company that manufactures the ingredient was able to withdraw its notification and continue to market the chemical as GRAS, despite the questions raised by the agency.
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Japanese company Tokiwa Phytochemical (Tokiwa) voluntarily notified the Food and Drug Administration (FDA) in August 2014 that it had determined its extract of Apocynum venetum leaves was Generally Recognized as Safe (GRAS). The extract, called Venetron, would be an “ingredient in food” at levels up to 100 mg per day, the company said in the notice (GRN 530). Tokiwa indicated that Venetron could be incorporated into “health food product[s], such as tablet[s] or capsule[s],” but did not identify specific foods to which the substance might be added.
In support of its GRAS determination, the company presented results of preclinical and clinical investigations that examined the safety of the extract in mice and healthy adult male volunteers. They also reported data on the effectiveness of Venetron to treat individuals with mild depression. It convened a panel of three experts ‒ Drs. Veronika Butterweck (Univ. of Applied Sciences and Arts, Northwestern Switzerland), Sansei Nishibe (Health Sciences Univ. of Hokkaido), and Kuo-Hsiung Lee (Univ. North Carolina at Chapel Hill) ‒ to review the studies, as well as a “history of human intake” of Rafuma [another name for A. venetum] leaf extract and its use as a dietary supplement in Japan and as a drug in China to treat insomnia, kidney disease, hypertension and heart palpitations.
Tokiwa said the panel “unanimously concluded that VENETRON™, when used in foods in general at levels providing a daily total intake of 100mg/person/day, is safe,” and that the GRAS determination was based on “scientific procedures supported by a history of safe use.” Read More »