Earlier quoted context omitted.
Would you still consider 5,000 IU of Vitamin D per day safe as far as these calcium issues go? I had a doctor tell me to take that dose for at least a few months a few years ago after low levels in my bloodwork during the winter. But I've never known if I should lower the dose to take on a continuing basis or adjust during the summer when I get a little more sun (but I still work in an office/at home so spend a lot o…
I do see people get high calcium levels after being on this dose for years. But not always. You may be able to handle that dose. If you are getting "routine" labs done, then there is likely a calcium level in there. If your calcium is normal (under 10.0 mg/dl for adults over 40, younger adults can be a little higher), then your Vitamin D dose is ok... but I would still recommend coming down a bit on that dose. It is…
Specifically, Vitamin K:
Ballegooijen, Adriana J. van, Stefan Pilz, Andreas Tomaschitz, Martin R. Grübler, and Nicolas Verheyen. “The Synergistic Interplay between Vitamins D and K for Bone and Cardiovascular Health: A Narrative Review.” International Journal of Endocrinology 2017 (2017). https://doi.org/10.1155/2017/7454376.
And Magnesium:
Uwitonze, Anne Marie, and Mohammed S. Razzaque. “Role of Magnesium in Vitamin D Activation and Function.” The Journal of the American Osteopathic Association 118, no. 3 (March 1, 2018): 181–89. https://doi.org/10.7556/jaoa.2018.037.
I'm also curious on your thoughts on what you consider high for supplementation, vs say sunlight exposure, as a single MED of sunlight exposure is equivalent to about 10-25K IU of oral supplementation.
Engelsen, Ola. “The Relationship between Ultraviolet Radiation Exposure and Vitamin D Status.” Nutrients 2, no. 5 (May 4, 2010): 482–95. https://doi.org/10.3390/nu2050482.
On the flip side, I've seen that in a recent RCT, that recommended sun exposure guidelines were not sufficient in reversing deficiency:
Lee, Yu-Mi, Se-A Kim, and Duk-Hee Lee. “Can Current Recommendations on Sun Exposure Sufficiently Increase Serum Vitamin D Level?: One-Month Randomized Clinical Trial.” Journal of Korean Medical Science 35, no. 8 (January 22, 2020). https://doi.org/10.3346/jkms.2020.35.e50.