Interesting post Katerina - here in the UK I believe that the advice is almost all adults are Vitamin D deficient during the winter months because we don't get enough sunlight then and should take a supplement of 400ul per day, and that high doses should only be taken for short periods. I have been taking 4,000ul per day until I read that earlier this week, and do have some arrhythmia, so have switched to the 400ul dose.
Will watch this post to see if any of the wise gurus have more comments for those of us with valves (though mine is mechanical, unlike yours)
There are two books that are relevant - "Vitamin K2 And The Calcium Paradox: How a Little-Known Vitamin Could Save Your Life Kindle Edition"
see Amazon at
"
https://www.amazon.com/Vitamin-K2-C...and+the+Calcium+Paradox&qid=1602883973&sr=8-1" or buy it used at Abe Books
and "How Not To Die With True High-Dose Vitamin D Therapy: Coimbra’s Protocol and the Secrets of Safe High-Dose Vitamin D3 and Vitamin K2 Supplementation"
from Amazon or Used from Abe Books.
The essence is that Vitamin K2 is the driver of a mechanism the body has that moves calcium from where it should not be to where it should be. If one is taking high doses of Vitamin D to boost calcium levels, it deposits the calcium wherever. This can cause problems with the breasts, the smooth muscle tissue, the arteries (plaque), etc. Taking vitamin K2 with it causes the calcium to be deposited in the correct locations and avoids the ill effects. Also, taking more then 500 mg of calcium at a time can be toxic to the kidneys and cause cancer as the kidneys can only absorb 500 mg at a time. This can be mitigated by taking time release Calcium. The only brand that I am aware of that is time release is Citrical but surely there must be others?
There are other books on the market as well as research articles. Unfortunately, Dr. Coimbra is Portuguese and his medical research is unreadable for me. But there are enough articles and books to get the gist of what to do. InterLibrary Loan is normally your friend. In these epidemic times, we are substituting Abe Books (used books).
Add the K2 and Vitamin C and you should do well. K2 can affect blood thinners. Increment in small doses and test with your meter. Vitamin D can affect your immune system and when taken as a supplement instead of via sunshine needs to be handled carefully and cautiously. Again, test regularly.
There have been studies in prisons and in Japan that show that high doses of Vitamin D are as (more?) effective then flu shots at preventing the Flu. A book on Covid 19 and the Spanish Flu showed that both were worst where sunshine was scarce and temperatures low and at their best where sunshine was abundant and temperatures moderate to warm.
A related medical article that can serve as a starting point for further research is "Vitamin D deficiency and co-morbidities in COVID-19 patients – A fatal relationship?"
located at
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7276229/You should read the "correction" as well as it leads one to the conclusion that all medical research should be taken (cautiously) with a grain of salt ! - )
Walk in His Peace,
Scribe With a Lancet