I'm in a similar situation with my MIL, except her problem is fibromyalgia. I have pointed her to countless articles and books that illustrate how this lifestyle can eliminate her pain. She tried primal - for like 2 or maybe 3 months. I don't really think it was that long, but I'll give her the benefit of the doubt. Anyhow, recently, I noticed she's been eating CW foods again, so i sent her a link that was all about how Paleo is the answer to fibromyalgia. It was even written by an MD. She sent me a message saying "I know what foods do and don't bother me. I've been researching fibro for 3 years. I think I deserve some credit for that." I simply said "Ok... well, disregard. Just thought I'd share what I'd stumbled upon".
while eating Primal, her symptoms did subside, but I don't think they subsided enough for her liking, like she expected to magically be cured overnight b/c she ate a steak instead of spaghetti. To get off of her prescription meds, she turned to pot... cheaper I'm sure, probably more "primal", but totally turns me off. I lost a lot of respect for her when that came into play b/c I'm zero tolerance when it comes to illegal drugs and currently, in Iowa, it's still illegal, even for medicinal purposes.
So, I gave up with her. I don't feel her pain so I isn't a problem to me if she chooses to eat crap foods.
I have a runner friend who wants to drop those last 10-15 lbs b/c she thinks it'll shave an extra 20 seconds off her mile pace. Sure, probably would... she asked me what I've been doing b/c I lost 37 lbs doing next to nothing while she runs and runs and runs and runs and....... She seemed interested at first, then quickly backed off saying she's a long distance runner and needs her pasta... sure. Ok. In the meantime, she's eating Nutrisystem cardboard while I'm eating steak and veggies for lunch. "How's that cardboard?", I always want to ask.
My husband is doing better. He's 6'1" 320 lbs. He was losing weight and stopped. Since he's stopped, he's back on the sugar rushes all the time. Ice cream every night, cookies for snacks (gluten free since I am transitioning my son and now MIL only makes gluten free cookies so son can have some - DH is making the gf thing difficult when I'm not around by providing foods with gluten), etc. He eats primal/paleo meals, but still consumes lots of junk so his weight loss is non-existent.
SOMEDAY, when they see how young and vibrant and amazing we have become, they will either become envious and join us or they'll continue down their destructive paths. In the meantime, bump up the life insurance policies and keep the health insurance paid up.