Yavethalion

the Yavethalion is a mildly enchanted grape, originally  native  to  mild,  temperate  ocean shores but  now widely  cultivated. Its fruit, sometimes called the sweetest in the world, contains a stimulant which heals concussion hits  when eaten  raw. When cooked or made into wine, yavethalion retains   its  sweetness   but  loses  most  of  the stimulant.