Probably not that many, honestly. It’s niche. Even the intuit today have moved to a mostly western diet, with its incumbent issues.

Right now the most mainstream use case for carnivore is as a elimination tool - people having some gut or inflammation issue go strict pure carnivore for 6 weeks or so, then introduce different foods back into their diet - very slowly - until the issue happens again.

Like, vegans already have their own issues in getting the right nutrients, and I’d think that carnivores would have a harder time. Scurvy?

In your own example, the Intuit did not suffer from scurvy. Also, meat has vitamin C in it, yes really, yes I know some places list it as 0… it’s assumed 0, but when measured, its there.

Think of it this way, if there is something necessary for animals to have, and you eat the animal that has it… you probably get it to… at least the essential forms of it. This assumes your eating the entire animal, tip to tail, meat, fat, organs… especially liver! This is why ground /minced meat is so great, especially if you can get a mix with organ meat in it… all in one, one stop shopping.