Methyl chavicol, also called estragole or isoanethole, is a phenol methyl ether found in basil, fennel, ravensera, star anise, anise, and tarragon. Methyl chavicol may be carcinogenic in high doses, and the IFRA has a limit on amounts permitted in products sold. Certain chemotypes of basil, ravensara, and tarragon can […]