A Nutrition Prevents Dementia and Weakness of Legs

The amount of vitamin D in the body is proportionate to cognitive function and the strength of legs.
 
Function of Vitamin D
Vitamin D restores declining body cells.
We have about 60 trillion cells. The cells are damaged and decline by aging and others.
Vitamin D restores the cells and protects around the cells.
Usually nerve cells in the brain and muscle cells are not easily restored, but vitamin D is expected to be able to restore them.
 
How to increase Vitamin D
The amount of vitamin D in the blood expected to be effective for our health is 30 ng/ml
There are very few people whose vitamin D is more than 30 ng/mL. In a research, there are only 2 people among tested 300 people.
 
1 slice of salmon (100 grams) contains vitamin D of 40 shiitake mushrooms which is considered containing a lot of vitamin D.
 
In a town in Japan where the cultivation of salmon is popular, there were 30 time more people whose vitamin D is more than 30 ng/mL.
 
The efficient way to intake vitamin D from salmon is eating the skin of salmon as well.
Vitamin D is oil soluble and there is a lot of vitamin D between the skin and the flesh of salmon. The skin of salmon has more vitamin D than the flesh.