I need to encourage my family to lose weight (10 points)?

I have the same problem. Maybe you could offer to make them a yummy vegan meal. I try to eat healthy, but my mom buys cookies and cakes and stuff and she says its for my broter, but i can't resist. She does buy vegan stuff like soy milk and tofu for me though. Eating vegan can be yummy. You should try it. Good luck :)