If you’re constantly moving sugar is a necessity for maintaining glycogen. There’s nothing inherently wrong with any food type, it’s all about context.

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moltar 4 hours ago | parent | next [-]

That’s false. Carbs are not a requirement for human body. Proof of that are native populations living far north, exclusively off of animal food sources.

Human body prefers ketones as a source of energy. But glycogen is faster.

My simplified mental model is like this. Ketones are normal gasoline. And glycogen is racing fuel (ethanol). If you run a stock car on racing fuel it may start and drive for a while but it’s damaging the engine and creates unnecessary wear.

	▲	andor 31 minutes ago \| parent [-]
		“Ketones are normal gasoline” is a very fringe view. Ketone supplements have been available for a while, and nobody was able to show any benefit of using them. 100% snake oil. If on the other hand you want to produce ketones endogenously, you basically have to put your body in a state of starvation. It’s not really gasoline then, more like burning the passenger seats as fuel so you can arrive at the destination.

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steve_adams_86 7 hours ago | parent | prev [-]

Kind of; humans do adapt remarkably well to low-glucose diets, and we can produce glycogen without sugary inputs via gluconeogenesis. They do make it much easier, though.

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rzmmm 6 hours ago | parent [-]

Well you need some substrate which can be metabolized into sugar, such as carbohydrate or protein.

	▲	steve_adams_86 5 hours ago \| parent [-]
		Definitely. I was only responding to the statement that sugar is a necessity for energy if you’re moving around a lot. You can do this without sugar.