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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Certainly could be true but that’s a separate hypothesis
"More carbs = higher death rate". You're asking him to exclude what may be the main causal mechanism that makes that claim true.
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It of course would be an interesting and important thing to know, to distinguish that cause from others, but it's an invalid argument against using that study as evidence for his hypothesis.
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There's plenty of evidence to believe that carbs and fat together, independent of calories, is worse for health than low carb + high fat. It comes down to insulin resistance. Carbs shut off fat burning, so all the fat you eat with them goes straight to storage.
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I don’t know if we’re on the same page. There are separate studies about diet adherence, and they don’t necessarily find strong evidence that low carb diets have better adherence. There’s wide variability. What they do tend to show is whatever produces weight loss, yields benefit
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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.
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Or even go back further. Eat what hunter gatherers ate. Which surely isn't a high carbohydrate diet https://www.ncbi.nlm.nih.gov/pubmed/11965522
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Few topics inspire as much passion in people as diet!
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It’s a separate hypothesis in the sense that the proper way to prove that causal mechanism would be 1 - more calories increase mortality 2 - carbs cause you to consume more calories
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No, with sufficient evidence we can conclude that increased carbs cause increased mortality without having to know whether that occurs via 2-then-1 or via some other intermediate mechanisms.
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