I was having coffee with a friend yesterday, who'd just gone to see a doctor after a surgery he'd had, which was mostly healed. This doctor was pretty firm about "now is the start of the later part of life, all the decisions you make now are going to determine the quality of rest of your life". Basically, encouraging healthy eating and regular exercise.
His blood markers weren't great (high glucose and insulin, in the pre-diabetic range). The doctor told him to basically stop eating carbs, or limit them very strictly.
My reaction to this story (as a carnivore) was that he was EXTREMELY lucky to get a doctor who would go out on a limb and tell him to stop eating carbs. Most doctors will give the standard advice (eat lots of whole grains, lots of fruits and vegatables). I CONGRATULATED him, and told him how lucky he was to have a doctor like this, who would tell the sometimes difficult truth. Most doctors will wait till you're ACTUALLY diabetic, and then put you on drugs.
And here's what he told me, "But, I'm already low-carb!"
I happen to know that this is precisely NOT true. I'd had lunch with him recently, while he had a huge grilled cheese sandwich, lots of bread. And when we met yesterday we were in kind of a self-serve coffeeshop, and he was experimenting with the syrups, and they also had some sugary kambucha on tap, which he had.
If you're eating keto, you're DEFINITELY not eating or drinking any sugary crap that you run across, and of course zero other carbs. So he was absolutely NOT keto.
I didn't push it. That's a good way to lose a friend. But really, self-deception is the worst.