Your post tells me you would benefit from a multivitamin. That give you Vitamin C as well as other other supplements the “Lion Diet” would miss.
Organ meat, meat, dairy, and seafood provide all the vitamin C you need. And on a carnivore diet, you absorb vitamins and minerals much more efficiently because you aren’t dealing with all the gut inflammation.
I am not on this diet but my husband switched to it, after doing keto for about 10 years. He feels great, his inflammation and allergies are gone, and his bloodwork is optimal.
There is sound research and MDs who support keto and carnivore. My husband follows a cardiologist who is well known proponent of the carnivore diet.