5 ms·

We need to understand the impact of increased vitamin D on vitamin D average vs vitamin D deficient people. I was vitamin D deficient, lowest part of the spectr

by fumar 5y ago

We need to understand the impact of increased vitamin D on vitamin D average vs vitamin D deficient people. I was vitamin D deficient, lowest part of the spectrum, and since taking daily supplements I noticed less health issues overall. I believe it also helps with my sleep cycle. YMMV I am regularly tested for vitamin D and its consistently above average, but you must monitor to not exceed the threshold.

dominotw 5y ago
i've been skiing 3-4 days/week with around 8 hrs out in the sun. Would this have the same beneficial effects on me? I am always deficient but i din't bother taking anything so far due to lazyness.
- hyencomper 5y ago
  For Vitamin D synthesis, the sun needs to be at an angle of 50 degrees or higher. Depending on the latitude where you live, the sun may not get that high all winter so you may need to supplement.
  - tim333 5y ago
    Surely sunlight is still sunlight even if it's from a low angle?
    - lodi 5y ago
      No, the composition of sunlight literally changes throughout the day. When the sun is low in the sky in the morning or evening, light is traveling through more atmosphere than it is at noon. As light travels through the atmosphere, a certain fraction is scattered in a wavelength-dependent way. UV-B light--the Vitamin-D-causing kind--has a hard time passing through the atmosphere because of interactions with ozone molecules, so at grazing angles almost none gets through. However UV-A light is less affected by ozone and can still give you a sunburn. Interestingly, ordinary glass blocks both.
    - beagle3 5y ago
      From memory, it's not just about sunlight, but rather specific band of uv-light; and the atmosphere filters it when the sun is at specific angles. It's not as simple as "just sunlight".
- williamtwild 5y ago
  Unless you ski naked its not doing much .
serverholic 5y ago
Do you just swallow a pill?
- jeff303 5y ago
  Yep, it's the most insanely underappreciated public health intervention in history.
  - thinkcontext 5y ago
    Many public health people say that iodized salt takes those laurels. Or maybe its the most bang for the buck, at an estimated $.05/person/year to prevent intellectual and developmental problems. Guess it depends on exactly what you mean. https://en.wikipedia.org/wiki/Iodised_salt https://en.wikipedia.org/wiki/Iodised_salt
- andy_ppp 5y ago
  Vitamin D is a fat soluble vitamin isn't it, so maybe we need more than just swallowing a pill. We have very bad data from most Vitamin D studies suggesting it does almost nothing. The people with high natural Vitamin D who spend 1-2h per day (exercising?) outside might just imply a proxy for a healthy lifestyle. Alternatively Vitamin D might need to be a) taken in higher quantities than the studies have done b) taken with fat c) taken with other supplements K2, NAC, Magnesium (which people are also deficient in) etc. We could probably come up with other theories why the trials and results don't add up. Nice to see an actually positive result from supplimentation.
  - sandworm101 5y ago
    >> who spend 1-2h per day (exercising?) outside might just imply a proxy for a healthy lifestyle. Try living in the north. Being outside, exercising, and sunlight exposure are three unrelated activities for at least six months of the year. Vitamin D supplements are the only way short of tanning lamps.
radicaldreamer 5y ago
Also make sure you're getting your calcium levels tested as too much Vitamin D can lead to hypercalcemia.
- sizzle 5y ago
  thanks for sharing, never knew this. Got a good source to read more up on it?
- pstuart 5y ago
  Vitamin K2 can address that: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4566462/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4566462/
  - fumar 5y ago
    I take K2 with vitamin D. Good call.
- genousti 5y ago
  I had hypercalcemia and it was causing me headaches and short term memory loss. Two things i cut off that helped a lot 1. Vit d 2. Sony noise reduction headphones
  - chaimanmeow 5y ago
    For a daily dose as low as 2000 IU this is not going to be a concern for adults, especially when taken with a meal. Generally for avg+ weight males, even 5000 IU with a large meal is not going to cause issues with hypercalcemia. Look to avoid added calcium in multivits first. Women and those concerned with bone health should supplement with boron instead. Dietary calcium should be more than enough in typical diets. The only calcium containing supp i might take would be calcium ascorbate (it's a fairly small dose of calcium). Having wattage emitted in RF bursts 2mm from your head is never a good idea (yup, i wholly approve of avoiding this: "2. Sony noise reduction headphones").

by fumar 5y ago

dominotw 5y ago

i've been skiing 3-4 days/week with around 8 hrs out in the sun. Would this have the same beneficial effects on me? I am always deficient but i din't bother taking anything so far due to lazyness.

hyencomper 5y ago
For Vitamin D synthesis, the sun needs to be at an angle of 50 degrees or higher. Depending on the latitude where you live, the sun may not get that high all winter so you may need to supplement.
- tim333 5y ago
  Surely sunlight is still sunlight even if it's from a low angle?
  - lodi 5y ago
    No, the composition of sunlight literally changes throughout the day. When the sun is low in the sky in the morning or evening, light is traveling through more atmosphere than it is at noon. As light travels through the atmosphere, a certain fraction is scattered in a wavelength-dependent way. UV-B light--the Vitamin-D-causing kind--has a hard time passing through the atmosphere because of interactions with ozone molecules, so at grazing angles almost none gets through. However UV-A light is less affected by ozone and can still give you a sunburn. Interestingly, ordinary glass blocks both.
  - beagle3 5y ago
    From memory, it's not just about sunlight, but rather specific band of uv-light; and the atmosphere filters it when the sun is at specific angles. It's not as simple as "just sunlight".
williamtwild 5y ago
Unless you ski naked its not doing much .

serverholic 5y ago

Do you just swallow a pill?

jeff303 5y ago
Yep, it's the most insanely underappreciated public health intervention in history.
- thinkcontext 5y ago
  Many public health people say that iodized salt takes those laurels. Or maybe its the most bang for the buck, at an estimated $.05/person/year to prevent intellectual and developmental problems. Guess it depends on exactly what you mean. https://en.wikipedia.org/wiki/Iodised_salt https://en.wikipedia.org/wiki/Iodised_salt
andy_ppp 5y ago
Vitamin D is a fat soluble vitamin isn't it, so maybe we need more than just swallowing a pill. We have very bad data from most Vitamin D studies suggesting it does almost nothing. The people with high natural Vitamin D who spend 1-2h per day (exercising?) outside might just imply a proxy for a healthy lifestyle. Alternatively Vitamin D might need to be a) taken in higher quantities than the studies have done b) taken with fat c) taken with other supplements K2, NAC, Magnesium (which people are also deficient in) etc. We could probably come up with other theories why the trials and results don't add up. Nice to see an actually positive result from supplimentation.
- sandworm101 5y ago
  >> who spend 1-2h per day (exercising?) outside might just imply a proxy for a healthy lifestyle. Try living in the north. Being outside, exercising, and sunlight exposure are three unrelated activities for at least six months of the year. Vitamin D supplements are the only way short of tanning lamps.

radicaldreamer 5y ago

Also make sure you're getting your calcium levels tested as too much Vitamin D can lead to hypercalcemia.

sizzle 5y ago
thanks for sharing, never knew this. Got a good source to read more up on it?
pstuart 5y ago
Vitamin K2 can address that: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4566462/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4566462/
- fumar 5y ago
  I take K2 with vitamin D. Good call.
genousti 5y ago
I had hypercalcemia and it was causing me headaches and short term memory loss. Two things i cut off that helped a lot 1. Vit d 2. Sony noise reduction headphones
- chaimanmeow 5y ago
  For a daily dose as low as 2000 IU this is not going to be a concern for adults, especially when taken with a meal. Generally for avg+ weight males, even 5000 IU with a large meal is not going to cause issues with hypercalcemia. Look to avoid added calcium in multivits first. Women and those concerned with bone health should supplement with boron instead. Dietary calcium should be more than enough in typical diets. The only calcium containing supp i might take would be calcium ascorbate (it's a fairly small dose of calcium). Having wattage emitted in RF bursts 2mm from your head is never a good idea (yup, i wholly approve of avoiding this: "2. Sony noise reduction headphones").