gluten-free       
adjective uk/ˌɡluː.tənˈfriː/ us/ˌɡluː.t̬ənˈfriː/
 无麸质的
containing no gluten (= a protein contained in wheat and some other grains)
  Gluten-free bread can be found in most large supermarkets. 在大多数大型超市都能找到无麸质面包。 
 a gluten-free diet 无麸质饮食