My dad and I are very similar in some ways, but very different in other ways. Our mannerisms and attitude toward things are similar, but the way we take care of ourselves and treat others is different. I always take pride in being healthy and exercising. He mocks/makes fun of the healthy food I make, scoffs at it, and constantly argues with me about Whole Foods and everything else. We also use primarily natural cleaners (better life and vinegar), and I feel a lot better about not putting chemicals in our home. They actually work very well, but he resfuses to even try them and continues to buy comet and bleach. He never listens to me about either of those things. These are two huge interests for me and he doesn't care (yes, he has told me directly that he doesn't care). I have talked to him many times about this and how it hurts my feelings, and he either A: Victimizes himself and points out things that I do that he doesn't like B: says that I shouldn't care about any of this stuff because I'm a kid. Lately I've been at the end of my rope. He constantly berates these things that are important to me. I honestly feel like God has given me this knowledge of health, and I want to do the best that I can. I have watched my grandpa die of cancer and go through strokes and seizures, and I just don't want him to end up with those issues. I just don't know what to do as he is insensitive and won't even begin to understand when I tell him that he is hurting me. Advice?