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The worthlessness of Vitamin D is mildly exaggerated

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Re: The worthlessness of Vitamin D is mildly exaggerated

#181
post #163
post #17

Earlier quoted context omitted.

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Re: The worthlessness of Vitamin D is mildly exaggerated

#182

Earlier quoted context omitted.

The sun in northern countries in summer is less intense?

Yeah, kinda. I moved from Indiana to Norway - Trondheim, which is about in the middle of the length of Norway. During the summer, I can read outside at night even though the sun technically goes down for about 4 hours in June. It never gets darker than twilight. A few clouds means you might just have sunset all night. The sun does get surprisingly hot and very warming if we happen to have a sunny day. Jacket in the s…

> The reason for this is that the sun is at a low angle, so it hits more of your body than it does when the sun is overhead - like you'd get in Australia. This also means that while you need some sunscreen during the day - from about 10 to 5 - it doesn't burn as much.

Not sure if I parse this correctly - I'd imagine you need more sunscreen at "low angles" due to more severe and longer exposure? Low angle -> more body surface area exposed directly at near-right angle to Sun -> more direct absorption -> more sunscreen needed?

Re: The worthlessness of Vitamin D is mildly exaggerated

#185
post #7

This is a refreshingly balanced and honest analysis of Vitamin D studies. The strongest evidence for Vitamin D is in people who are severely deficient. Bumping up to a normal range can provide some improvements. The health influencers started noticing that the Vitamin D studies coming out weren't matching their original hype for Vitamin D, so many pivoted to trying to make claims that most people are severely deficie…

My family runs a blood analysis lab in Belgium for which I wrote some of the statistics gathering software. The thresholds for 25-OH vitamin D: When I looked at all 1738 blood samples that had their Vitamin D tested between Feb 1, 2020 and Mar 13, 2020 (We were looking into the link between Vitamin D and COVID-19): The median (P50) was 20.1 ng/mL and the average was 22.4 ng/mL. Standard deviation: 11.24 ng/mL Half th…

Worth noting all the three big studies mentioned in the article were on Americans.

Re: The worthlessness of Vitamin D is mildly exaggerated

#186

Earlier quoted context omitted.

Yeah, kinda. I moved from Indiana to Norway - Trondheim, which is about in the middle of the length of Norway. During the summer, I can read outside at night even though the sun technically goes down for about 4 hours in June. It never gets darker than twilight. A few clouds means you might just have sunset all night. The sun does get surprisingly hot and very warming if we happen to have a sunny day. Jacket in the s…

> The reason for this is that the sun is at a low angle, so it hits more of your body than it does when the sun is overhead - like you'd get in Australia. This also means that while you need some sunscreen during the day - from about 10 to 5 - it doesn't burn as much. Not sure if I parse this correctly - I'd imagine you need more sunscreen at "low angles" due to more severe and longer exposure? Low angle -> more body…

at lower angles the sun light needs to go through a much bigger "cross section" of atmosphere which greatly reduces its energy.

This is why noon sun is the most dangerous.

Re: The worthlessness of Vitamin D is mildly exaggerated

#187

Earlier quoted context omitted.

Yeah, kinda. I moved from Indiana to Norway - Trondheim, which is about in the middle of the length of Norway. During the summer, I can read outside at night even though the sun technically goes down for about 4 hours in June. It never gets darker than twilight. A few clouds means you might just have sunset all night. The sun does get surprisingly hot and very warming if we happen to have a sunny day. Jacket in the s…

Huh now I know why I never liked living in Washington and Oregon, especially at higher altitudes. The sun always felt hotter.

I summer in California and winter in Washington for that reason!

Re: The worthlessness of Vitamin D is mildly exaggerated

#188

Earlier quoted context omitted.

My life changed after I got tested for vit D and started talking supplements. I was severely deficient. I am now sufficient and everything changed for me.

How do you know the changes aren’t placebo?

Because I was suicidal, had extreme mood swings and all of the muscle pain and instability.

I didn't even know about vit D, didn't research it. I just got a panel done to get an idea of what's going on with me and discovered I was severely deficient on vit D

Re: The worthlessness of Vitamin D is mildly exaggerated

#189
post #40

The survey in the article that assessed vitamin D deficiency was a bit odd: > Because physical exams are performed in mobile vans in NHANES, data could not be collected in northern latitudes during the winter; instead data were collected in northern latitudes during summer and in southern latitudes in winter. To address this season-latitude aspect of the NHANES design, we stratified the sample into two seasonal subpo…

> Now imagine if you lived in northern Europe around the 60th parallel, where the sun doesn't get high enough in winter to produce vitamin D.

Like... all of Finland? And most of Norway?

Both countries where the answer to "when does the sun rise?" can be "at the end of January".

Re: The worthlessness of Vitamin D is mildly exaggerated

#190

Earlier quoted context omitted.

My family runs a blood analysis lab in Belgium for which I wrote some of the statistics gathering software. The thresholds for 25-OH vitamin D: When I looked at all 1738 blood samples that had their Vitamin D tested between Feb 1, 2020 and Mar 13, 2020 (We were looking into the link between Vitamin D and COVID-19): The median (P50) was 20.1 ng/mL and the average was 22.4 ng/mL. Standard deviation: 11.24 ng/mL Half th…

Worth noting all the three big studies mentioned in the article were on Americans.

The last of the three was done on Australians. Not that it changes your point, given the latitude of Australia.
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