Ezinye izifundo ziveze ukuthi ukudla okuningii-cantharidin(ukudla komuntu omdala kwamaqanda angama-50 nsuku zonke) kungaholela ekwakhekeni kwe-pigment ku-retina, kodwa lokhu kufakwa kuyahlehliswa. Uma uyeka ukuyithatha, ukufakwa kuzonyamalala.
I-Food and Agriculture Organization ye-United Nations/World Health Organization Joint Expert Committee on Food Additives yahlola ukuphepha kwe-canthaxanthin ngo-1995 futhi yabeka ukudla kwansuku zonke kwe-canthaxanthin njengo-0-0.03 mg ngekhilogremu ngayinye yesisindo somzimba. (Ukudla kwansuku zonke kubalwa ngokusekelwe esisindweni somzimba, futhi kuhlola inani lento emukelwe ekudleni noma emanzini okuphuza nsuku zonke empilweni yomuntu ngaphandle kokudala izingozi zempilo.)
I-International Agency for Research on Cancer ayizange ihlole umdlavuza we-cantharidin. Kodwa-ke, ngokusho kokuhlolwa kwekomidi elihlangene, abukho ubufakazi bokuthi i-cantharidin ibangela umdlavuza ekuhlolweni kwezilwane.
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