No. It’s none of my business, and it’s unlikely that she lives in the US but is the one person who is somehow unaware of her unhealthy eating habits – reminders of how bad pretty much everyone’s diet is (no matter what) are everywhere; it’s like smoking cigarettes, you just can’t escape it. Combining that with that maybe she’d rather live happily now than unhappily for a long time, and there’s really not a whole lot of good that can come from me bringing it up.