4 ms·

It must be replicated. In the meantime, it's probably a good idea for people in Northern areas to take 1-2k IUs/day.

• _delirium 15y ago
  It might be worth considering at any latitude; despite the association with sunlight, the NIH notes that "perhaps surprisingly, geographic latitude does not consistently predict average serum 25(OH)D levels in a population". (http://ods.od.nih.gov/factsheets/vitamind http://ods.od.nih.gov/factsheets/vitamind)
• psykotic 15y ago
  Get your levels measured and dose accordingly. Most people are deficient in a number of areas, and you can get screened for them all at once. In the absence of that, if you're just making a qualified guess, you should probably dose significantly more than 1,000-2,000 IUs/day. The daily intake required for toxicity to be an issue are very high (sustained total intake of around 20,000 IUs/day). It's also generally recommended that D3 supplements are taken alongside a K2 supplement.
  • jerf 15y ago
    "Most people are deficient in a number of areas, and you can get screened for them all at once." May I double-click on that? What do you mean? Who do you go to, and what exactly do you say to them? Which areas are you referring to?
    • psykotic 15y ago
      Talk to your doctor. They can take a blood test and send it off to analysis. It can be somewhat expensive. When I said "all at once" I didn't mean that a simple biochemical test can reveal all deficiencies, obviously, but that a single blood test can be sent off to have many different tests done. I'm not yet sure exactly how it works in the US, sorry. The kind of deficiencies I had in mind would be vitamin (e.g. D, K), mineral (e.g. iron, calcium) and electolytic (e.g. magnesium, potassium).