Supplement or Supplemental may refer to:
Health and medicine Bodybuilding supplement Dietary supplement Herbal supplement
Media Supplement (publishing), a publication that has a role secondary to that of another preceding or concurrent publication Supplement (album), by Ai Nonaka The Supplement, a 2002 Polish film In literary theory, an idea of Jacques Derrida from Of Grammatology Supplement, a role-playing or tabletop game expansion pack
Other uses Supplement, one of a pair of supplementary angles, considered relative to the other
See also Supplementary (disambiguation) Supply (disambiguation)