#additive  something added to enhance food or gasoline or paint or medicine
  supertype:  #improver__addition  a component that is added to something to improve it; "the addition of a bathroom was a major improvement"; "the addition of cinammon improved the flavor"
  subtype:  #adjuvant  an additive that enhances the effectiveness of medical treatment
  subtype:  #food_additive__artificial_additive  an additive to food intended to improve its flavor or appearance or shelf-life

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