I already take vitamin D for weightlifting, I guess I'm covered. Many advantages also for hormones.
Vitamin D supplementation to prevent acute respiratory tract infections (2017)
131–140 of 178 posts
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#132I can say from my own experience that the lack of vitamin D can have a significant impact on both mind and body. I suspect that essentially all people living at relatively northern latitudes have some sort of vitamin D deficiency. From what I know you need to have your face and arms exposed to direct sunshine for at least 15 minutes/day to keep healthy vitamin D levels in the body. Good luck with that in the European…
> 15 minutes
Depends on your own skin color too.
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#133I am a bit perplexed. Haven't almost all randomized/controlled trials shown (e.g. [1]) that there is basically no measurable effect for healthy people? All "positive" stories are relying on observational studies with the usual confounders, right? EDIT: Look at figure 2 in the Paper. Looks pretty random to me. Result is almost exclusively driven by 4-5 small ( [1] https://www.vox.com/2018/10/4/17933880/vitamin-d-healt…
Vitamin D in the study you provide, D2 & D3 in the OP link. Chemistry and source matters. D is synthetic, D2 is plant derived, D3 animal derived.
D3 mostly comes from fungi as far as commercial sources for supplements are concerned, I'm pretty sure.
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#134May I mention the following research on NCBI: https://www.ncbi.nlm.nih.gov/pubmed/28768407 I will simply quote from the abstract: > This could lead to a recommendation of 1000 IU for children 1 year of age, and around 8000 IU for young adults and thereafter. Actions are urgently needed to protect the global population from vitamin D deficiency. Essentially, the recommended intake that pharmacists and labels tell you…
I'll counter that with a quick quote from wikipedia: > Recommendations stemming for a single standard for optimal serum 25(OH)D concentrations ignores the differing genetically mediated determinates of serum 25(OH)D and may result in ethnic minorities in Western countries having the results of studies done with subjects not representative of ethnic diversity applied to them. Vitamin D levels vary for genetically medi…
I wouldn't say you 'countered' OP with that quote, but you did add some very pertinent and helpful info. From my perspective, though, your info is syngergistic with OP's, not counter to it.
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#135Earlier quoted context omitted.
That seems implausible. Obviously there was evolutionary pressure on northern Europeans to tolerate lower levels of sunlight and no doubt adaption happened. However, I expect even Swedes evolved in an environment that included more time outdoors than a modern Swedish office worker gets. So, in the absence of any actual evidence, I'd still expect a problem. On top of that, there is some evidence. Basically all the pap…
The first two articles I get from that search looks at vitamin d and the older population, and the third[1] suggests that even in sub-arctic elevations "Adequate levels were found in 79.2%, more often in women (82.7%) than in men (75.6%). Only 0.7% of the population were vitamin D3–deficient but 23.1% of men and 17.1% of women had insufficient levels." That doesn't seem too damning. At the end of the day I don't know…
I wonder, have any northern populations developed an instinctive winter hibernation adaptation?
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#136I had my Vitamin D levels tested last year, was enlightening. For those interested it's a pretty painless (small blood sample) and inexpensive test.
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#137Earlier quoted context omitted.
This is one reason arctic people eat so much (vitamin D rich) fish. The other is of course that a plant based diet is impractical when plants are only alive half the year. White skin itself is an evolutionary adaption for getting enough vitamin D outside of tropical Africa. The extreme "melanin-anemic" blond & blue eyes look of Scandinavia is thought to be because it has a uniquely warm weather for the latitude, whic…
I'm probably missing something obvious but... Should white skin not reflect sunlight more, and dark skin absorb it more? I agree that northerners have more need to absorb sunrays and hence make more vitamin D, so shouldn't they be black?
Evolution makes adaptations to what it already has, unlike a sentient designer who might create an optimal design then look for ways to implement it.
If you could design a human from scratch, it might be most efficient to give northerners a D synthesizing pigment that's opaque in the necessary wavelength, resulting in the situation you describe.
Instead we have protective pigments near the surface, synthesizing structures underneath, and a need to balance D synthesis against UV damage.
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#138Earlier quoted context omitted.
> 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.
Out of personal curiosity, what supplement brand do you take? I live in Ams as well and the season is...horrible.
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.
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#139I had my Vitamin D levels tested last year, was enlightening. For those interested it's a pretty painless (small blood sample) and inexpensive test.
I was recently charged several hundred for a vit D test. The price is basically random in the US.
Re: Vitamin D supplementation to prevent acute respiratory tract infections (2017)
#140Earlier quoted context omitted.
What about DHA/EPA? Iodine and vitamin B1? Our modern diets could cause further nutritional deficiencies. I doubt that many people in the West eat fish regularly or supplement with algae oil due to the conveniences of processed food. Same with iodine. Wheat germs have the highest concentrations in vitamin B1, but whole grains in general (rolled oats etc.) are good so you should probably cut the processed food out as…
True iodine deficiency is quite rare in the west as many table salts are fortified with iodine. It is extremely uncommon to see people with Goiter in the US. The same goes for thiamine/B1 deficiency which used to cause cardiovascular and neurological disease in alcoholics, but is now very rare becuse many pastas/breads/cereals are fortified with B1.
In the UK, you can barely find table salt that has iodine. The one has the right potassium/sodium ratio with iodine (e.g. Iodized LoSalt) is zero.