Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 551157
Title Risk assessment of intake of pyrrolizidine alkaloids from herbal teas and medicines following realistic exposure scenarios
Author(s) Chen, Lu; Mulder, Patrick P.J.; Peijnenburg, Ad; Rietjens, Ivonne M.C.M.
Source Food and Chemical Toxicology 130 (2019). - ISSN 0278-6915 - p. 142 - 153.
DOI https://doi.org/10.1016/j.fct.2019.05.024
Department(s) Toxicology
BU Contaminants & Toxins
VLAG
BU Toxicology, Novel Foods & Agrochains
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Extraction efficiency - Herbal medicines - Herbal teas - Margin of exposure - Pyrrolizidine alkaloids - Shorter-than-lifetime exposure
Abstract

In this study five types of herbal teas were used to quantify the effect of comminution of the leaves on resulting PA exposure. Results show that PA levels extracted from intact leaves were consistently lower than from comminuted tea leaves. The Margin of Exposure (MOE) approach was applied to evaluate the consequences of this difference for the associated risks in the scenario of lifetime exposure. Furthermore, we considered medicinal use of these teas for shorter-than-lifetime exposure scenarios, and also analysed the risks of shorter-than-lifetime use of eight herbal medicines and 19 previously analysed plant food supplements. This analysis revealed that shorter-than-lifetime use resulted in MOE values < 10,000 upon use for 40–3450 weeks during a lifetime, with for only a limited number of herbal teas and medicines use of two weeks a year (150 weeks during a 75 year lifetime) would still raise a concern. It is concluded that taking more realistic conditions into account markedly reduces the concerns raised for these herbal preparations. These results also illustrate the need for development of a generally accepted method for taking short term exposure into account in risk assessment of compounds that are genotoxic and carcinogenic.

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