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Leo Abstract's avatar

I agree, and also I note that both words in 'nutrient deficiency' are doing a lot of heavy lifting. People can't agree what a vitamin is. Do they know what nutrients are either? And deficient in what sense? For instance, I'm not sure at this point I regard fructose as much of a 'nutrient', and you probably don't consider anything else in fruit as much of a nutrient either. And in evolutionary time, there's a distinction a bit like short-term vs long-term. We're supposed to overeat fruit when we get it -- seeds too. It's only for a season, and then the snow falls.

As for the specifics of this experiment, I did a bit more reading and feel vindicated on my 'fermented foods' guess. The most common explanation for humans liking 'sour' is connected with our inability to make our own vitamin C, but some (e.g. professor Rob Dunn) connect it to fermentation. In an interview, he says, “The acid produced by the bacteria kills off the pathogens in the rotten food. So we think that the sour taste on our tongue, and the way we appreciate it, actually may have served our ancestors as a kind of pH strip to know which of these fermented foods was safe.”

Craving for "spicy" food is explained by some (people are saying) as due to the endorphins -- not everyone produces them equally in response to all stimuli, and for some spicy foods do a good job of it (for some, running does -- we both know you're not that one).

Craving for salt of course is well-known and well-understood.

So. Even when you're fully metabolically healthy, would it be unreasonable for you to overeat salty spicy sour foods, especially when your brain thinks it's the end of summer (or some other strange period in which you went months without sour fructose)? Is keto truly an evolutionary-enough state that your 'deficiency' system is throwing no error codes at all, even below the surface? Would you have so intense a craving for a humble salsa if it weren't? These aren't rhetorical questions, I do genuinely wonder.

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grillbert's avatar

"I don’t buy the argument that we are now constantly swimming in much more hyper-palatable food." why not? it seems very obvious that food producers have been specifically manufacturing food to be exponentially more palatable over the years. its not as if our grandparents were eating seed oils or the 600-900 number of compounds referred to as artificial flavors.

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