How much Vitamin D is safe to take?
Can a person overdose on Vitamin D or is Vitamin D Autointoxication a Myth?
Except for any noted source material, content copyright, Neva. J. Howell, all rights reserved
I’ve been researching Vitamin D and cancer, specifically a highly absorbable form of Vitamin D, called Vitamin D3.
I became interested in this link after reading information included in my package when I started on the CardioCocktail, that suggested most of us may be Vitamin D deficient and that, particularly in the winter, most could benefit from upping their daily dosage of this important vitamin.
The link between cancer and Vitamin D is being explored and some feel that this link is very significant. However, there’s a lot of info out there about what amount of Vitamin D is safe and at what dosage Vitamin D Autointoxication can occur. I watched one doctor on youtube who swears that there is really no unsafe amount, unless you are taking insane amounts. This is also the view of other sites I checked, some authored by medical doctors or researchers.
However, in continuing my online research, I see that the opinion on Vitamin D Autointoxication varies greatly. Just two examples…..
Wikipedia article on the subject notes that an absolute safe dose of vitamin D for long term use is not known, but states that up to 2,400 i.u.’s per day are generally considered safe for otherwise healthy individuals and that, among reported cases of Vitamin D intoxication, none have been reported in people taking 1,000 i.u.’s or less per day.
Another site that I find a bit annoying because it branches off so many ways that I never seem to be able to follow a path from start to finish says that toxicity can occur with a dosage of as little as 1,600 to 2,000 vitamin D i.u’s per day, if taken longterm.
From what I’ve read, the primary concern appears to be renal. If there were an undiagnosed kidney problem, taking too much vitamin D could be harmful because Vitamin D increases calcium absorption so, potentially, “might” contribute to urinary or kidney stones over time. I think this would be more apt to happen if a person was prone to kidney or urinary stones already. I also saw some indication here and there that suggested those with liver problems or liver damage might not tolerate high doses of vitamin d as well over time.
Vitamin D Autointoxication would be less likely, I would think, in areas where less sunlight is available too….in the winter months, in those parts of the country, less would be available through the action of sunlight so more might need to be consumed.
I have read enough to convince me that Vitamin D3 deficiency could definitely be a factor in the development of cancer and I’m interested to see what new research comes forward about that in the future.