3 ms·

10,000 IU is the upper limit recommended by researchers, but afaik 4,000 is the more commonly accepted/advised number.

by canttestthis 8y ago

beagle3 8y ago
The recommended dose and limit are body weight dependent, age and light/uv exposure influenced.
- canttestthis 8y ago
  Yes, agreed, but the 10,000 IU number is on the very upper end of the recommended intake in some research papers regardless of your body weight and age, and about twice as high as the upper recommended intake in current medical consensus. I'm also not a doctor but I would just ask anyone considering 10,000 IU / day for a long period after reading this post to run it by their doctor first.
macawfish 8y ago
Wasn't there a recent study suggesting that the recommended daily value was off by a factor of ~10? I think an important thing to consider is that if your going to take large amounts of vitamin D, you should also be getting enough magnesium to prevent unhealthy calcification. In the winter, I've taken one time doses of ~40,000 IU every few weeks or so, (always in the morning of course). I remember reading that 40,000 IU every single day for more than 3 months was what it would take for many people to develop hypercalcemia. Because vitamin D is fat soluble, that made me feel pretty safe taking a large mega dose from time to time. The effects of a large megadose are emotionally palpable. But I will say that the magnesium also seems important. I have a sensitive ankle that was once run over by a taxi and got badly sprained. Last winter, I started taking daily vitamin D without magnesium, and was probably doing about 10,000 IU/day. After a week or so, I noticed that my ankle was acting up more than usual. I took an epsom salt bath (magnesium sulfate) and it helped immediately. (https://www.vitamindcouncil.org/about-vitamin-d/am-i-getting-too-much-vitamin-d/ https://www.vitamindcouncil.org/about-vitamin-d/am-i-getting...)
- speakeron 8y ago
  > I think an important thing to consider is that if your going to take large amounts of vitamin D, you should also be getting enough magnesium to prevent unhealthy calcification. You should be taking vitamin K as well.
- hedvig 8y ago
  I bought a magnesium spray but in reading up about absorption through the skin the evidence doesnt seem certain. Unless its getting absorbed through the rectum in a bath? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579607/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579607/
  - macawfish 8y ago
    That could be... All I know is that it works. Epsom salt baths are incredibly soothing, especially if you're liberal with the epsom salt

10,000 IU is the upper limit recommended by researchers, but afaik 4,000 is the more commonly accepted/advised number.

beagle3 8y ago

The recommended dose and limit are body weight dependent, age and light/uv exposure influenced.

canttestthis 8y ago
Yes, agreed, but the 10,000 IU number is on the very upper end of the recommended intake in some research papers regardless of your body weight and age, and about twice as high as the upper recommended intake in current medical consensus. I'm also not a doctor but I would just ask anyone considering 10,000 IU / day for a long period after reading this post to run it by their doctor first.

macawfish 8y ago

Wasn't there a recent study suggesting that the recommended daily value was off by a factor of ~10? I think an important thing to consider is that if your going to take large amounts of vitamin D, you should also be getting enough magnesium to prevent unhealthy calcification. In the winter, I've taken one time doses of ~40,000 IU every few weeks or so, (always in the morning of course). I remember reading that 40,000 IU every single day for more than 3 months was what it would take for many people to develop hypercalcemia. Because vitamin D is fat soluble, that made me feel pretty safe taking a large mega dose from time to time. The effects of a large megadose are emotionally palpable. But I will say that the magnesium also seems important. I have a sensitive ankle that was once run over by a taxi and got badly sprained. Last winter, I started taking daily vitamin D without magnesium, and was probably doing about 10,000 IU/day. After a week or so, I noticed that my ankle was acting up more than usual. I took an epsom salt bath (magnesium sulfate) and it helped immediately. (https://www.vitamindcouncil.org/about-vitamin-d/am-i-getting-too-much-vitamin-d/ https://www.vitamindcouncil.org/about-vitamin-d/am-i-getting...)

speakeron 8y ago
> I think an important thing to consider is that if your going to take large amounts of vitamin D, you should also be getting enough magnesium to prevent unhealthy calcification. You should be taking vitamin K as well.
hedvig 8y ago
I bought a magnesium spray but in reading up about absorption through the skin the evidence doesnt seem certain. Unless its getting absorbed through the rectum in a bath? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579607/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579607/
- macawfish 8y ago
  That could be... All I know is that it works. Epsom salt baths are incredibly soothing, especially if you're liberal with the epsom salt