Translation of "violaxantina" into English

Considerando que certos estudos puseram em causa a eficácia dos carotenóides « Violaxantina »; que é, portanto, necessário proibir a utilização deste corante;

Whereas certain studies have cast doubt on the effectiveness of the carotenoid 'violaxanthin', whereas it is advisable to ban the use of this colourant;