To add to the CW Moments: shopping with a friend who now has a good job all, watching him by ten or more 12-packs of soda (a diet one was thrown in for good measure), an armful of Gatorades (salty/sugary colored water), walking through the food sections and by passing all fruits and veggies but taking the moment to consider buying a storemade cake. He has gradually put on weight over the years with the help of bad foods and alcohol. He's had acid reflux since HIGH SCHOOL and he's only in his 20s. I've shared with him about my parents' success.
I don't know if the people fear change, or fear admitting that what they've been doing is somehow "wrong", or a betrayal of their health, or not wanting to accept help based on all those things or if it just adds to a life of confusing information.
I guess all we can do is keep trying and leading by example.
It took me a while to get on board, but I made small steps in the right direction and eventually got my parents to join in on everything.