That is a pretty cool way to provide some info, not exactly on target, but pretty cool none the less.
It is pretty much all referring to "rabbit starvation."
From the first link:
Protein poisoning (also referred to colloquially as rabbit starvation, mal de caribou, or fat starvation) is a rare form of acute malnutrition thought to be caused by a complete absence of fat in the diet.
Excess protein is sometimes cited as the cause of this issue; when meat and fat are consumed in the correct ratio, such as that found in pemmican (which is 50% fat by volume), the diet is considered nutritionally complete and can support humans for months or more (not indefinitely, especially in Arctic conditions). Other stressors, such as severe cold or a dry environment, may intensify symptoms or decrease time to onset. Symptoms include diarrhea, headache, fatigue, low blood pressure, slow heart rate, and a vague discomfort and hunger (very similar to a food craving) that can be satisfied only by the consumption of fat.
Protein poisoning was first noted as a consequence of eating rabbit meat exclusively, hence the term, "rabbit starvation". Rabbit meat is very lean; commercial rabbit meat has 50–100 g dissectable fat per 2 kg (live weight). Based on a carcass yield of 60%, rabbit meat is around 8.3% fat.[1] while beef and pork are 32% fat and lamb 28%. [2]
The animals in the arctic are heavy on fat, the author of one of the books went into the subject of consuming too much protein. I am really not sufficiently interested in the subject to pursue it further. Plain and simple it can kill you, but it really isn't very relevant since we aren't explorers stranded in the Arctic. (Another thing that such people have died from was the consumption of too much vitamin A, primarily from the livers of wolves and polar bears, just in case you have an expedition planned for yourself).
