Read "Becoming Vegetarian" by Melina and Davis. I'm half through it right now and I feel very informed XD If you do your research and you can answer any questions they have about nutrients and how you'll get them, then they have no reason to be against you.
My mom, though hesitant at first, has started to really respect me when she realized how serious I was and how I had put effort into knowing what I needed to do to be healthy. If they stop believing it's just a phase, I'm sure they'll support you more =D (Well, hopefully XD)
My mom, though hesitant at first, has started to really respect me when she realized how serious I was and how I had put effort into knowing what I needed to do to be healthy. If they stop believing it's just a phase, I'm sure they'll support you more =D (Well, hopefully XD)