Step 1: Discuss vegetarian pros
Point out the health advantages of vegetarians: lower body mass, cholesterol, blood pressure, and rates of heart disease, type two diabetes and certain cancers.
(When you bring health as a factor, it really spurs them on)
Step 2: Argue meat cons
Argue that antibiotics used for growth in animals can lead to antibiotic-resistant bacterial infections in humans.
(This is essential as well :)
Step 3: Reference environmental data
Reference environmental data, such as habitat loss, ecosystem damage, soil erosion, and the greenhouse gas production involved in growing animal feed.
(Dont want to kill helpless animals)
Step 4: Use humanitarian reasons
Tell them that much of the arable land worldwide is being used to grow grain to feed animals rather than people. Many people are starving while animals are being force-fed. Cruelty to animals is also implicit in producing meat, dairy, and eggs.
(get will the program dad, eating meat was so 1930)
Step 5: Name famous vegetarians
Give them a who’s who of notable vegetarians, including the Greek mathematician Pythagoras, Leonardo da Vinci, Mahatma Gandhi, and Sir Paul McCartney.
(mahatma lead a non-violence movement, see what veggies can do!)
Step 6: Ask for their support and input
Ask your parents for their support and listen to their concerns and suggestions. They’ll be more open to the idea if you get them involved.
(show them your mature)
Step 7: Plan sample meals
Invite them to help you plan sample meals with alternate protein sources. Be willing to compromise.
Step 8: Offer to cook
Offer to cook some of the meals. This will take the pressure off Mom or Dad trying to juggle one menu for you and one for the rest of the family. It’ll also show you’re serious about your decision and willing to put in the work.
(not everyone eats a meal thats fulll of meat, theres always veggies)
This may seem hard to do. But it should work. Once they realize that you are taking this seriously and that you are going to mature about. They should agree. I have it lucky since my parents are the ones that are vegetarians but I've seen this work in other families.