Some have added fish to their dietary; but, speaking generally, all who are called vegetarians will be found to abstain from the use of flesh and fowl and almost invariably also from fish as food.
The close connexion of the Hyperboreans with the cult of Apollo may be seen by comparing the Hyperborean myths, the characters of which by their names mostly recall Apollo or Artemis (Agyieus, Opis, Hecaergos, Loxo), with the ceremonial of the Apolline worship. No meat was eaten at the Pyanepsia; the Hyperboreans were vegetarians.
Conversely, vegetarians may have lower dietary exposures to chemicals which are more prevalent in meat and fish (e.g. arsenic ).
Vegetarians have lower blood pressure than do people who eat meat.
But anywhere that can cater for vegetarians can cater for vegetarians can cater for vegans if they want to.