[mountn man]

Salts in our brain decide whether we are asleep or awake.

For the first time, researchers have shown that the level of salts in our body and brain differ depending on whether we are asleep or awake.

Correlation is not causation.

[pieceofthepuzzle]

“Salts in our brain decide whether we are asleep or awake.”

That’s because it’s hard to eat potato chips when you are asleep.

[bert]

high blood sugar has an effect on my sleep. About 3:00 something changes and I wake up but it is not salt

[molewhacka]

There you go bringing logic into a scientific debate. You will never score a cushy grant with that kind of thinking.

[molewhacka]

“...While these shifts in ion concentration outside of brain cells had been known to occur, these changes had always been regarded as a consequence rather than one of the causes of the sleep-wake cycle, as the new study suggests.

“The fact that a simple alteration of extracellular ion composition can wake a sleeping animal up and put a wake animal to sleep is direct evidence for that this mechanism plays a key role in regulating consciousness,” said Nedergaard...”

[Dr. Sivana]

Correlation is not causation.

From the article:
The researchers have used mice to test whether injecting salt into the brain enables control of the mouse's sleep-wake cycle

While this isn't the same as injecting into a human, it IS more than mere correlation.