My dad was really hesitant on it at first. He thought it was a phase or something, I guess. The first time I ended up caving after a few weeks because I was getting sick due to not getting the food I needed. A few months later I brought up the idea to him again, told him how important it is to me, and we went out that weekend to buy vitamins and meat alternatives. From my experience, the best way was to tell my parents about how healthy it is and how alternatives can be easy substitutes. Also agreeing to cook my own meals helped, but he ended up cooking mine separate for me anyway
My mom hated me for it, she still does but a little less now. It’s been about two and a half years since I became a vegetarian she’s gotten over it a little. But she still thinks its super unhealthy and more expensive than eating meat. I hope once I graduate college I can become a vegan but until then it’s not really possible with my mom around.
For those who don’t have supportive parents I would just say stick with your beliefs but don’t make your parents hate you. If you can’t be a vegetarian or vegan get active with animal rights and try to make a difference. Once you move out try it out