It's after traces were found in her system from eating vegetables from her own garden.
Laois chef Darina Allen has joined the calls for an alternative to glyphosate to be found.
It's the main ingredient in the weedkiller Roundup - and its current licence in Europe is due to expire in 2022.
The founder of Ballymaloe Cookery School was surprised to recently find traces of the chemical in her system, although primarily eating from her organic garden.
The Cullohill woman says a huge amount of research has been done into the side effects of the glyphosate on humans, and believes it should be phased out.
However, farmers must be supported in the transition:
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