I'm skeptical of the practice, but it may be adopted for various reasons.
Which of the particles are you talking about?
I was referring to vegetarianism. It's the practice of abstaining from poultry, seafood, and any animal flesh.
I see. I have never been one or met one before but I do not believe in vegetarians 
Vegetarianism is an old idea dating back to ancient India and Greece.
I see. Many things comes from the Greek people. Which of other things do you know comes from Greece.
Greece
Greece, officially the Hellenic Republic (), also known as Hellas (Greek: Ελλάς), is a country located in Southern and Southeast Europe, with a population of approximately /1e6 round 0 million as of . Athens is the nation's capital and largest city, followed by Thessaloniki.
Greece is located at the crossroads of Europe, Asia, and Africa. Situated on the southern tip of the Balkan Peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north,
Vegetarianism
Vegetarianism is the practice of abstaining from the consumption of meat (red meat, poultry, seafood, and the flesh of any other animal), and may also include abstention from by-products of animals processed for food.
Vegetarianism may be adopted for various reasons. Many people object to eating meat out of respect for sentient life. Such ethical motivations have been codified under various religious beliefs, as well as animal rights advocacy. Other motivations for vegetarianism are health-related, political, environmental, cultural,