during the dream phase of sleep, also known as REM sleep, our stress chemistry shuts down and the brain processes emotional experiences and takes the edge off difficult memories.
Dr. Stasha Gominak Discusses Sleep and Vitamin D Pt. 1 (by ETMC1)
Great video on vitamin D by a neurologist talking about the effects of D and Cpap on her patients, together with relevant research. The idea is low vitamin D can cause lots of neurological problems - in addition to global problems throughout the body.
It’s 1 hour + runtime.
I love the idea that vitamin D is not just a bone building hormone, but a global hormone telling the body to repair itself - and fix any number of things that can go wrong in the body. I love the idea that it can repair the brain.
"We are organized to use our body when awake and repair it during sleep."
It’s also interesting that if the vitamin D levels get too high, a number of low vitamin D symptoms re-emerge.
It’s interesting the idea that people should test their vitamin D levels to optimize their dosage.
The right test is D25OH and the right level is 60-80 ng/ml.
researchers believe that very young children take naps because so-called sleep pressure builds rapidly in their brains — that is, the need for sleep accumulates so quickly during waking hours that a nap becomes a biological necessity. It is not just a question of how much total sleep that children need in 24 hours. Possibly because of the intense synaptic activity that goes on in their highly active, highly connected brains, young children are less able to tolerate long periods of time awake.
People ate an average of nearly 300 calories more when they were sleep-deprived compared to when they were well rested, research presented at an American Heart Association revealed. And the calories overwhelmingly came from junk foods like ice cream and fast food.
In one study, researchers found that people who received only four hours of sleep a night for two nights experienced:
18 percent reduction in leptin
28 percent increase in ghrelin
It’s interesting to see some degree of quantification here.
The Average American is sleep deprived - and their performance is impaired
This is a great study where subjects’ sleep was restricted to 3,5,7, or 9 hours. P.V.T. is a measure of how much your performance is impaired by lack of sleep.
in the seven-hour group, their response time on the P.V.T. slowed and continued to do so for three days, before stabilizing at lower levels than when they started. Americans average 6.9 hours on weeknights, according to the National Sleep Foundation. Which means that, whether we like it or not, we are not thinking as clearly as we could be.
some people who need eight hours will immediately feel the wallop of one four-hour night, while other eight-hour sleepers can handle several four-hour nights before their performance deteriorates. (But deteriorate it will.) There is a small portion of the population — he estimates it at around 5 percent or even less — who, for what researchers think may be genetic reasons, can maintain their performance with five or fewer hours of sleep. (There is also a small percentage who require 9 or 10 hours.)