Some nutritional supplements are in fashion for a time, and then their effects slowly fade from public consciousness. For example, grape seeds are high in proanthocyanidines and supposedly effective in combating senility.
有些保健食品則在風行一段時間後，漸漸地在人們心中失去了功效。像富含「前花青素」、號稱可以抗衰老的葡萄籽，被大力炒作流行一陣子後，效果似乎沒有民眾預期的那麼明顯，已逐漸退燒。