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A comment on Vitamin D supplementation to prevent acute respiratory tract infections (2017). Parent comment

Re:Vitamin D supplementation to prevent acute respiratory tr... by leto_ii on Monday March 02, 2020 @08:23AM (#22464133)
> i feel as if my memory is far better and i dont feel tired all the time.

I agree. Don't overdo it though, 5000 IU daily seems a bit much :) I live in Amsterdam and take 2000.

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Re:Vitamin D supplementation to prevent acute respiratory tr... by chrismeller on Monday March 02, 2020 @10:14AM (#22465039)
There have actually been a couple of studies lately about Vitamin D recommendations being drastically too low. For example [1] recommends 4000 IU/day for adults and [2] recommends 8000 IU/day.

1: https://www.medscape.com/viewarticle/744128 2: https://www.ncbi.nlm.nih.gov/m/pubmed/28768407/

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Re:Vitamin D supplementation to prevent acute respiratory tr... by speakeron on Monday March 02, 2020 @08:31AM (#22464210)
I take about 5000 IU daily (with one or two days off every 10 days or so). I get tested regularly and measure at the top of the lab's 'normal range' (200 nmol/l). I also take vitamin K (especially K2).
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Re:Vitamin D supplementation to prevent acute respiratory tr... by pdonis on Monday March 02, 2020 @11:24AM (#22465780)
> 5000 IU daily seems a bit much

I think it depends on the person. If you get your blood level checked when you have a regular physical, you can adjust the dose as needed to keep the level where you want it (I shoot for the upper end of the normal range, and 5000 IU a day seems to be doing that for me).

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Re:Vitamin D supplementation to prevent acute respiratory tr... by blaser-waffle on Monday March 02, 2020 @12:55PM (#22466836)
Canada here. "Central Canada" aka reasonably far up.

2000 IU a day, 3-5 days a week. Not strict about it, just whenever I remember. Big difference in terms of energy, depression, sleep quality, etc.

I've messed around with higher levels but they usually give me wicked headaches.

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Re:Vitamin D supplementation to prevent acute respiratory tr... by ArikBe on Monday March 02, 2020 @09:11AM (#22464563)
Out of personal curiosity, what supplement brand do you take? I live in Ams as well and the season is...horrible.
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Re:Vitamin D supplementation to prevent acute respiratory tr... by aries1980 on Monday March 02, 2020 @12:36PM (#22466605)
I take GAL D3 or D-complex+K2 Forte (https://www.gal.hu/en/spd/VIGAD303001/GAL-D3-vitamin and https://www.gal.hu/en/spd/VIGAKKF02001/GAL-K-complex-Forte). They are quite transparent on how they source and extract the ingredients.
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Re:Vitamin D supplementation to prevent acute respiratory tr... by leto_ii on Monday March 02, 2020 @10:09AM (#22464997)
Currently I take the one from physalis: https://www.hollandandbarrett.nl/shop/product/physalis-vitam...

You can probably play around with the brands and doses a little. I think the important thing is to take gel capsules with oil inside and not solid pills. Vitamin D is fat-soluble so I think solid pills don't get absorbed very well.

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