Michael_T said...
I've been "following" this thread (as in reading it) since it started, but will admit that I'm not really "following" it (as in understanding) a lot of the nuances. But it has underscored the importance of Vitamin D to me and, coincidentally, I had my annual labs this week so for the first time I looked at my Vitamin D number...
It's 40 ng/mL, which is in the sufficient range, although at the lower end of it. What I'm trying to understand is there a *likely* benefit to supplementing my Vitamin D (I don't do that now) to boost it even higher than that.
Michael,
I am not sure if there is all that much nuance to this thread. All that is going on here is that I had previously made a public "bet"(so to speak) in a few online places where I participate, as well as in person to people I know. And that bet was that every one (or very nearly so) who was in ICU with Covid, and most especially critically ill and on the ventilator, had low- most likely very low levels of vitamin D in their blood, and virtually no vitamin C in their blood. (that last part because not only did they likely start out with low vitamin C, but whatever vitamin C we do have is rapidly used up fighting acute stressors like CV-19). Then I had said I felt confident that I would collect on that bet if only some one would put it to the test. ( also, they would have to control for whether folks had started taking high doses of D before they got to the hospital, and or whether their doctor had been treating them with D or C )
And low and behold, a month or two later, multiple studies pop up where they are looking into just that. ( i.e. vitamin D, I have not heard of any one looking into vitamin C blood levels in ICU CV-19 patients. Spoiler alert
: it is low unless they are giving it to them). And low and behold, every study I have seen so far ( about
5 now I think) has confirmed my theory, some to an impressive degree. Now, admittedly all but this last one have been observational rather than clinical trials. So all they are doing is either looking at previous studies of peoples vitamin D levels in various countries and comparing that to how these countries have done with their death rates from CV-19. Or, in the last 2 studies(before the most recent one where they actually gave vitamin D), it's almost as if they heard my request: they actually measured the vitamin D blood levels of hospitalized Covid patients, solidly confirming that those doing better had higher levels, and those doing worse and in ICU had the lowest levels. To the point where in the Louisiana study, 100% of those under age 75 and in ICU with CV-19 were "insufficient", i.e. their definition of insufficient: less than 30 ng/ml. IOW, NO ONE with levels 30 or above made it into their ICU with CV-19.
But, nothing much to learn here other than a general principle, most probably: those with "inadequate" vitamin D in the blood tend to do much worse with CV-19, and those with "adequate" tend to do much better. More appears to be better, at least up to some unknown point. That is about
it. And unfortunately, except maybe for the last study/trial I just linked to, these studies still do not "prove" that taking vitamin D supplements will help you do better with CV-19. But in the last study I just linked to, they gave a small amount of D, and folks did a good bit better. So that one is getting closer to actual proof.
But now, what about
your situation? You have proved me wrong! I have been claiming that just looking at peoples blood levels ( with very rare exceptions) is sort of like determining who has been supplementing(or getting lots of sun). Because, I claimed, that population studies have consistently indicated that almost every one is below 30, and most a lot below 30, if they don't supplement or sun bathe. And here you come strolling in here with a level of 40 without supplementing. ( any sun exposure?). So how have you accomplished that? There are those rare "diseases" where folks run excessively high on vitamin D, though I can't think of what disease that is at the moment.
It seems likely that, with your level of 40 even without supplementation( a couple of months of taking 2000 IUs per day only got me up to 30), you are good to go. And I guess it proves yet once again there is no way to really know without measuring. If you had been in the study done in Louisiana, it seems to me that you could not have gotten sick enough to make it to ICU, with your natural level of 40, since no one else (Under age 75) did so with the level equal to or greater than 30.
Now I personally prefer a level of 50 or 60 or a bit more, and only start to worry about
toxicity when I might approach 100. My highest measured level is 80 and that when I was taking 10,000 IU/day, and as I said 2000/day only got me to 30. Here is a quote from a simple wiki article about
too much vitamin D (I know nobody likes Wiki, but for convenience) "Hypervitaminosis D is a state of vitamin D toxicity. The normal range for blood concentration is 20 to 50 nanograms per milliliter (ng/mL)......A mutation of the CYP24A1 gene can lead to a reduction in the degradation of vitamin D and to hypercalcaemia.......................Based on risk assessment, a safe upper intake level of 250 µg (10,000 IU) per day in healthy adults has been suggested by non-government authors................Acute overdose requires between 15,000 µg/d (600,000 IU per day) and 42,000 µg/d (1,680,000 IU per day) over a period of several days to months. .............................Endogenous production with full body exposure to sunlight is comparable to taking an oral dose between 250 µg and 625 µg (10,000 IU and 25,000 IU) per day.[10][11].................".
https://en.wikipedia.org/wiki/hypervitaminosis_dHere is another: "Vitamin D toxicity is rare. It is caused by supplementing with high doses of vitamin D rather than sunlight. The threshold for vitamin D toxicity has not been established; however, according to some research, the tolerable upper intake level (UL) is 4,000 IU/day for ages 9–71[162] (100 µg/day), while other research concludes that, in healthy adults, sustained intake of more than 1250 μg/day (50,000 IU) can produce overt toxicity after several months and can increase serum 25-hydroxyvitamin D levels to 150 ng/mL and greater.[28][163] Those with certain medical conditions, such as primary hyperparathyroidism,[164] are far more sensitive to vitamin D and develop hypercalcemia in response to any increase in vitamin D nutrition...........A review published in 2015 noted that adverse effects have been reported only at 25(OH)D serum concentrations above 200 nmol/L.[159] ( that = about
80 ng/ml)
Published cases of toxicity involving hypercalcemia in which the vitamin D dose and the 25-hydroxy-vitamin D levels are known all involve an intake of ≥40,000 IU (1,000 μg) per day.[164] "
https://en.wikipedia.org/wiki/vitamin_d#excessSo some say that above 80 is toxic, some say over 100, the above seems to associate well over 100 with toxicity("in healthy adults, sustained intake of more than (50,000 IU) can produce overt toxicity after several months and can increase serum 25-hydroxyvitamin D levels to 150 ng/mL and greater")".
My preference for a level greater than 40 is in part based on a study on breast cancer I have linked to before where those with 40 ng/ml did better than those with 30, but those with 60 ng/ml did a good bit better than those with 40. And yes, I do realize this is not a breast cancer forum. or a CV-19 forum. ;)
So you are a lucky fellow with a "natural" level of 40. Possibly good enough to keep you out of that Louisiana ICU with Covid. But should you go for more? I do not know. I would prefer a bit higher, but I certainly have no proof that is beneficial. If you decide to take 1000 or 2000 IU/day or more(think about
those days sunning on the beach or at the pool when you probably made 10,000-20,000 IUs), be sure to test again to see what it is doing to you. And if you do, please let me know, I'd be really interested in the results.
Post Edited (BillyBob@388) : 6/4/2020 3:15:43 PM (GMT-6)