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In mammals at least, smaller organisms have higher metabolic rate. But getting smaller is also developing towards "not existing" :)

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Good point. I was struggling with the idea that lower metabolism might mean higher efficiency (like when we started cooking food). And being Paleo/carb restricting could be seen as a step back too!

Maybe we should continue eating processed, insulin spiking, gut destroying foods and see how our body adapts next? (That's not sarcastic, just a proposal) How is our body adapting currently? (Diabetes is not an adaptation)

My take is that lower metabolism is just a lower ‘power saver’ mode for the body, and, like a computer, results in slower ‘processing ‘

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