> If anyone has found a way to turn that tide, I'm all ears.

Leading by example might not seem like it has immediate or direct impact, but it does have an effect nevertheless. You don't necessarily need to beat everyone over the head with a new way to live life. This tends to have the opposite of the desired effect. If others passively observe you and think "wow that person looks super healthy and happy" they may subconsciously seek to emulate your behavior.

I've heard this before, expressed as: "don't be a buddhist, be a Buddha".