The idea that you need lots of calcium to make strong bones is a myth put out by the Dairy industry.  In fact, one needs other elements as well such as magnesium, phosphorus and vitamin D, among others. If you consume too much calcium(which can happen via dairy-consumption or if you take calcium-supplements), then magnesium-uptake into the body gets blocked, thus leading to magnesium-deficiency, and magnesium is an essential element re human health.

There's also a famous international study showing that those countries with the highest level of dairy-consumption(eg:- Finland) also had the highest rates of osteoporosis. Vegetarians also like to point to another study that showed that the Bantu women of Africa had strong bones, despite only eating very small amounts of calcium in their diet.

Anyway, you don't need to worry, if you're eating health grassfed meats etc. you're getting enough calcium.

Vitamin C is already present in raw meats. It's cooking that destroys vitamin C. Mind you, zero-carbers like the Inuit would also eat things like raw adrenals, which happen to contain lots of vitamin C. My own view, though, is not to do such an extreme diet unless you're suffering from some specific carb-related problem such as candida.  My own trials with zero-carb were not successful, and it was extremely difficult to maintain for long periods as I would have needed to ensure ALWAYS having enough 100% grassfed fat to hand etc.