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Comment by metta2uall | Hacker News Reader

According to the Linus Pauling Institute, Vitamin K2 is found most plentifully in certain non-animal fermented foods, cheeses (no mention of them having to be 'raw'), and animal liver, rather than animal fat in general.

https://lpi.oregonstate.edu/mic/vitamins/vitamin-K

It seems animal (and human) fat doesn't store much Vitamin K which is why a steady dietary supply is necessary.

Also did ancient societies have higher average lifespans than today? I don't quite understand claims ancient people were healthier.. Of course modern lifestyles have severe inadequacies, but it's complex, and for example many Japanese have quite long life spans despite eating a lot of rice.

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Being healthy is not the only factor for long lifespan, there are also accidental risks (disease, being eaten by a tiger, ...) mitigated by our modern way of life and access to advanced healthcare.

A Masai is probably healthier than a cliche westerner fueled processed carbs and sitting all day, but the latter will certainly live longer.

As for Japanese eating lots of rice, portion control ? I'd guess they get a large proportion of their calories from rice, but don't over-eat. I used to live in Thailand, Thais eat all the time, mostly carbs but small portions, and there are still fewer fat people than in the West.

We are not talking about ancient 'societies' but rather ancient hunter gather people. Civilisation is only around 12,000 years old, modern humans have been around for 200,000 years and hominids for millions of years. Different time scale.

Think obesity, heart disease and diabetes. These don't exist in hunter gatherer people alive today and there is no record that humans ever had these problems before agriculture and civilization. We are better at treating health problems when they do arrise but we also have health problems that are caused by our lifestyle.

Why do people get dental work? Because good teeth are a sign of good health. We have far more problems with our teeth than hunter gatherer people but you don't see it because it is masked by dentistry. We have problems with blood pressure but it's masked with statins. We have problems with blood sugar but it's masked by insulin injections. We have problems with fatigue but its masked by coffee and sugar. We have problems with our joints and well... we haven't figured out what to do about that one yet. The list goes on.

Could it also be from your subconscious realising that starvation is more of a danger then predation?

They don't eat as much rice as you would think as a proportion of calories. Rice portions in most asian cultures can fit in the palm of your hand typically. Lots of veggies, fish and meats too.

Ex: https://thriftynomads.com/how-to-be-a-frugal-foodie-in-japan...

While americans typically have a much higher proportion of food as carbs & fat vs protein & veggies.

I'll admit that fermented food was also a common factor among all traditional societies, and yes its a good source of K. Price simply theorized K was the important factor, didn't prove it. But it almost doesn't matter what the single factor was (if there is a single factor), if we just eat an ancestral diet then we should get the benefits. Also animal fat has other benefits that Price was not aware of at the time, like inducing ketosis etc, which is why I mentioned it specifically.

Also perhaps the Japanese have long life spans in spite of eating lots of rice. Wheat grains seem to be harmful, whereas rice is a neutral carb, and Japanese get plenty of animal fats from pork in ramen, raw fish, etc.

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