I say very little to others about it, other than a "no thanks" or to closer friends, a "I'm trying to eat healthier." If they are respectful and ask for more info, I'm happy to to talk but otherwise, I don't offer more information. I've had a good friend
roll her eyes when I've mentioned my weight loss and healthy eating efforts, and it really hurt me. With her, I'm very careful with the subject. Particularly after a couple negative reactions with her, I make sure to tell myself that I'm doing what's best for me and that I'm doing a great job. My weight loss isn't about her. I also journal (paper journal) about reactions of folks as well as my own feelings on my weight loss journey-- that's really helped me focus on ME not on others. Support is important, to give and to get, but if some folks can't manage it, well, it says more about them than it does about me. I just keep up the good work getting healthy.
And kelly315 has a good point, most people respect a simple and clear health goal if they can see you need to lose weight. I think it'd be trickier if it wasn't clear, gosh, I see someone super skinny talking about losing weight and sometimes feel like screaming. But I don't
