Quote:
Originally Posted by mountainbikebabe
There is research out on Vitamin D and brain lesions
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The myth about Vitamin D and calcium causing brain lesions comes from this research
Calcium and vitamin D intakes may be positively associated with brain lesions in depressed and non-depressed elders
Those who are able to read and think for themselves will soon come to the conclusion that this is a set up.
The researchers have the finances available to do expensive MRI scans on the brains of these elderly people but choose to use dietary logs to work out Vitamin D and calcium status.
It's totally ludicrous to use diet as a measure of Vitamin D levels.
Everyone knows vitamin D3 is made in the skin and that is our main source, even in elderly people.
Although they don't make as much as younger folks, elderly people who live in the country and work in their gardens have higher levels than people the same age living and gardening, in urban environments.
It isn't the ability of the skin
or the diet that accounts for that difference but the air pollution.
The Payne research did not correct for the differences arising from urban or rural living.
The Payne research above didn't measure 25(OH)D3 although for research purposes the cost of 25(OH)D testing is trivial (less than $40) whereas the cost of MRI scans is in hundreds of $$.
If you have some motive to want to prove higher levels of vitamin D may be dangerous then you need to do proper measurements and this Payne research failed to do that.
When at best less than 10% of our daily vitamin D requirements could possibly come from diet (and that involves eating oily fish daily) only idiots and those with malicious intent would use a food frequency questionnaire to guess 25(OH)D status.
I agree that it is worth recognising the fact that increasing vitamin D status improves the absorption of calcium and that levels above 42ng/ml are required for maximum bone mineral density. Certainly taking magnesium and vitamin K2 will assist the creation of strong bones.
But that is NOT a reason for not raising vitamin D levels.
Calcium is best obtained and utilized from food sources.
If you want to preserve bone structure then not only do you need to increase your D3 intake (and magnesium +Vitamin K2) but you also need to
cut out the sodas.
The level at which babies are born with sufficient Vitamin D status to absorb calcium in optimum amounts from their diet and obtain natural vitamin D3 from their mothers breast milk is 58.8ng/ml and that requires 6400iu/daily supplementation at latitude 32 or an equivalent amount from non burning full body exposure to UVB bearing sunlight.
If you think you know better than the hundreds of thousands of years of evolutionary process found worked best then I would like to see your evidence.
This new research tells us that
25-Hydroxyvitamin D3 is an agonistic vitamin D receptor ligand
That means vitamin D requires just one hydroxylation to be an active hormone. But it is only an active hormone when present in sufficient amounts.
40ng/ml is too low. 60ng/ml gives it more act in the way we evolved to function.
Vitamin K2 information
There is good reason to say that
Developmental vitamin D deficiency causes abnormal brain development