More carbs = higher death rate A study of 130,000 people over 7 years showed that increasing carbohydrate intake from 40% of energy to 70%, ~DOUBLED mortality rate Fat is not killing people. Carbs arepic.twitter.com/ZYG8EIf4Ew
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You're insisting that nutrition studies be up to the rigors of physics, that if we don't isolate 1 cause to 1 effect ignore it. The biology is far too complex for that. If that's your standard there's no such thing as nutrition science & you should just eat what your grandpa ate.
BTW, scientific controls, while quite valuable for the science itself, are often abused in the reporting of science, here's a common way it is done: Study to show whether X causes Z via cause A, controlling for B,C,etc. Negative. Media reports as "study shows X doesn't cause Z."
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Very good point.
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I may have misused the term variable. What I was trying to say is, in order to understand the mechanism, we’d need to be able to tease out whether carbs -> overeating ->
, or
carbs-> X -> -
We have big enough challenges trying to link controllable causes (food in the mouth) with final effects (bad health outcomes), without confusing the reporting of results by trying to eliminate or prove all possible intermediate mechanisms. Vastly more complex than physics.
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Nutrition "science" *shouldnt* necessarily control everything.
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And statistical nutritional studies trying to go from diet to health outcomes generally *can't* control for everything, the subject is way too complex.
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This has also been abused by meta-studies that purport to find "no link between X and Z" when they are dominated by studies that controlled away the causal link between X and Z.
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Alas that's all 99% of people see is the media reporting. Also, nutrition scientists themselves too often commit this fallacy in meta-studies that purport to show no link between X and Z using studies that controlled for the link(s) between X and Z.
End of conversation
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