Yet another Lambert...

...has written a very long, but interesting, article about human food consumption. It covers a broad array of topics, but focuses mainly on what humans ate long ago, what we eat now, and the consequences.

UPDATE: A statement in the above article is possibly incorrect. The article states that:

"Even adults in the upper end of the "normal" range, who have BMIs of 22 to 24, would generally live longer if they lost some fat;"

However, Wayne Wood at Troppo Armadillo posted this yesterday. The relevant quote:

The core belief of those prosecuting this case is that the BMI tables testify to a strong, predictable relationship between increasing weight and increasing mortality. That, after all, is what most people assume when they read that medical and public health authorities have determined a BMI of 25 or above is hazardous to a person's health. This belief, however, is not supported by the available evidence.

A 1996 project undertaken by scientists at the National Centre for Health Statistics and Cornell University analysed the data from dozens of previous studies, involving a total of more than 600,000 subjects with up to a 30-year follow-up. Among non-smoking white men, the lowest mortality rate was found among those with a BMI between 23 and 29, which means that a large majority of the men who lived longest were "overweight" according to government guidelines. The mortality rate for white men in the supposedly ideal range of 19 to 21 was the same as that for those in the 29 to 31 range (most of whom would be defined now as "obese").

The case against fat proceeds on the assumption that if a fat person becomes thin, that person will acquire the health characteristics of people who were thin in the first place. Although this assumption may seem like simple common sense, it is, like many commonsensical assumptions, quite dubious. If a person who is physiologically inclined to be fat loses weight, this does not transform that person into someone who is physiologically inclined to be thin. To understand the implications of this distinction, consider that bald men die sooner, on average, than hirsute men, probably because bald men have higher levels of testosterone, which appear to lower life expectancy. Given this, surely no one would conclude that giving a bald man hair implants would improve his prospects for long life.

Great, my BMI is in the 30's and I'm losing my hair. On the plus side, I have more testosterone!