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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

#91

Post by HPsquared »

qurren wrote: post #50
Aerroon wrote: 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…

Not to mention, northern latitudes get more sun that average in summer, and most northern countries have more reasonable working hours so people actually do go outside.

More hours of sun, but it's less intense.

Re: The worthlessness of Vitamin D is mildly exaggerated

#92

Post by galleywest200 »

Aerroon wrote: 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…

Could this be why evidence suggests that redheads synthesize Vitamin D more efficiently? Red hair is more prevalent at higher latitudes (I think).

Can redheads produce Vitamin D in these darker conditions while others cannot do so effectively?

https://www.sciencealert.com/evolution-favored-genes-linked-...

Re: The worthlessness of Vitamin D is mildly exaggerated

#93

Post by rbjorklin »

nullc wrote: post #27
rzz3 wrote: post #19

Has anyone done a RCT of D3+K2? K2 seems to be important in the absorption of D3. Another aspect that bothers me with these studies is that we’re simply supplementing the vitamin D, seemingly without measuring the change in blood levels. I took 2000IU (+K2) a day for many years in between testing my blood levels and still had <30ng/ml and had to go up to 5000IU/day. I’d like to see some further study.

> I took 2000IU (+K2) a day for many years in between testing my blood levels and still had Likewise, 23ng/ml while taking 2000iu/day of dry vitamin-d. Switched to 5000iu +K2 in MCT oil, -- 8 months later I'm at 64ng/ml.

Any noticeable difference how you feel health wise? Energy levels? Mood? Sleep quality?

Re: The worthlessness of Vitamin D is mildly exaggerated

#94

Post by annzabelle »

galleywest200 wrote: post #92
Aerroon wrote: 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…

Could this be why evidence suggests that redheads synthesize Vitamin D more efficiently? Red hair is more prevalent at higher latitudes (I think). Can redheads produce Vitamin D in these darker conditions while others cannot do so effectively? https://www.sciencealert.com/evolution-favored-genes-linked-...

Pale skin in general helps synthesize Vitamin D. The less melanin you have the more you absorb, this is why lighter skin happens at northern latitudes. Darker skinned people are more likely to need to supplement it.

Re: The worthlessness of Vitamin D is mildly exaggerated

#95

Post by nostromo »

sbayg wrote: post #63
Aurornis wrote: 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…

Baby aspirin was overdone too. Interestingly, the fish oil hype cycle has a much longer timeline if you consider the popularity of cod liver oil once upon a time.

Cod liver oil wasn't hype, it was needed in norther climates to prevent rickets.

It was taken for its Vitamin D, not for its omega 3s.

Re: The worthlessness of Vitamin D is mildly exaggerated

#96

Post by bethekidyouwant »

vondur wrote: post #73

I was taking 4000IU of Vitamin D daily along with 100 mcg Vitamin K-2 MK-7. My Vitamin D level was 60ng/ml. I've since dropped down to 3000IU per day. I go outside a lot but am either covered or using sunscreen since I sunburn easily.

Pretty sure if you’re burning easily then you are making vitamin D easily so just go in the sun but not so much that you burn. (which is i think common sense)

Re: The worthlessness of Vitamin D is mildly exaggerated

#97

Post by galleywest200 »

annzabelle wrote: post #94
galleywest200 wrote: post #92

Earlier quoted context omitted.

Could this be why evidence suggests that redheads synthesize Vitamin D more efficiently? Red hair is more prevalent at higher latitudes (I think). Can redheads produce Vitamin D in these darker conditions while others cannot do so effectively? https://www.sciencealert.com/evolution-favored-genes-linked-...

Pale skin in general helps synthesize Vitamin D. The less melanin you have the more you absorb, this is why lighter skin happens at northern latitudes. Darker skinned people are more likely to need to supplement it.

Makes sense, thanks for the reply and clarification!

Re: The worthlessness of Vitamin D is mildly exaggerated

#98

Post by nostromo »

jvican wrote: post #17
dyauspitr wrote: post #11

Earlier quoted context omitted.

On a slight tangent, if people are unaware, you can pay for and get just about any lab test without a prescription in the United States.

Yes, and to be concrete, you can do so at economical prices at https://requestatest.com (it's a lifesaver in many occasions, I've used it 4 times with great success).

And you can use a HSA or FSA to pay for it.

Re: The worthlessness of Vitamin D is mildly exaggerated

#99

Post by adamredwoods »

written-beyond wrote: post #8
amanaplanacanal wrote: post #4

I suspect that blood vitamin D is mainly a marker for how much outdoor exercise people are getting, and that it is the exercise rather than the D which is causal.

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.

I am deficient, too, and take supplements (rare liver disease).

I wonder if taking mushrooms soaked in the sun improves absorption compared to supplements?

Re: The worthlessness of Vitamin D is mildly exaggerated

#100

Post by icedchai »

nullc wrote: post #27
rzz3 wrote: post #19

Has anyone done a RCT of D3+K2? K2 seems to be important in the absorption of D3. Another aspect that bothers me with these studies is that we’re simply supplementing the vitamin D, seemingly without measuring the change in blood levels. I took 2000IU (+K2) a day for many years in between testing my blood levels and still had <30ng/ml and had to go up to 5000IU/day. I’d like to see some further study.

> I took 2000IU (+K2) a day for many years in between testing my blood levels and still had Likewise, 23ng/ml while taking 2000iu/day of dry vitamin-d. Switched to 5000iu +K2 in MCT oil, -- 8 months later I'm at 64ng/ml.

I switched from 2000 to 5000iu about 8 years ago. My levels went up similar to yours, but I don't feel much different!
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