Answer: additive

AnswerCrossword Clue
ADDITIVEExtra ingredient
ADDITIVEF.D.A.'s concern
ADDITIVEGuar gum, e.g.
ADDITIVEBHT or MSG, e.g.
ADDITIVEPrepackaged food stuff
additiveA substance added to something in small quantities, typically to improve or preserve it
additivea substance added to foodstuffs