Hi,
@outdamnspot I know someone who eats raw beef and raw suet, and does very well with it. Amines increase when meat is cooked. I like raw kidney fat. It spreads nicely like an after dinner cheese, or a kind of grainy butter. The meat and kidney fat (suet) come from a rancher. The pastures are not sprayed, and the cows are 100% grass-fed.
I am active on a low carb forum which has had a couple of dozen people posting there for more than ten years, who eat all-meat diets, and a few of them eat only raw meat and raw fat. I tried raw ground meat and raw egg yolks for several weeks. I did really well on that. I felt more clear-headed and stronger than on any other fare. The "squeamish" factor is a bit high for me. Raw egg yolks are easy, and raw ground meat once in a while is nice. (Steak tartare in cookbooks.)
Source of food and good sanitation/refrigeration are the only things that come to mind, at the moment.
I have an idea that those of us who have low energy, are perhaps genetically deficient in the ability to turn protein into glucose (and deficient in the ability to get FFAs out of storage, related to pyruvate). If the capability for gluconeogenesis is not there, I do not see how a so-called "zero" carb diet would help someone. I do not do well at all if the carbs are too low. I can go one day at under 20 grams, but two days under 20, and I feel like hell. I have tried that several times over the years. I do well at 25-35 grams, and can push it to 50g/d, if I stay away from foods that cause me troubles (salicylates, glutamates, oxalates, gallates/phenols, amines, nightshades, casein....)
Cooking method is crucial for some people. Some can't have food cooked on gas. Some can't have food cooked directly on an electric burner.
I switched to drinking distilled water, for example, recently, and feel much better.