Crossword clues for Substance in food. 7 letters:VITAMINSubstance in food.NUTRIENTFood substance.FATSFood substances.STARCHFood substance.NUTRIENTHealth-food substanceDIGESTConvert food into absorbable substancesPTOMAINESubstance falsely tied to food poisoningFOILMetallic substance used in refrigerating foods.