Effect On Cats, Rats and Slime Mold
An unusual feature of valerian is that valerian root and leaves are a cat attractant similar to, and as safe as catnip. Valerian contains the cat attractant actinidine. Cat attractants might mimic the odor of cat urine, which is caused by 3-mercapto-3-methylbutan-1-ol (MMB). Anecdotal reports claim that valerian is also attractive to rats—so much so that it had been used to bait traps. Stories describe the Pied Piper of Hamelin using both his pipes and valerian to attract rats. Research also shows that valerian root is the strongest chemo-attractant of slime molds (Physarum polycephalum).
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