Wheat
<p>wheat may contain natural Valium – Wildmann, et al, 1987 “Diazepam and N-desmythyldiazepam are found in rat brain and adrenal and may be of plant origin” – Journal of Neural Transmission 70 (3-4): 383-398. </p>
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"In wheat grains diazepam and N-desmethyldiazpam could be identified by HPLC and analysis by gas chromatography combined with mass spectrometry".</p>