Geez, Talker, you won't let me out of this thread.
Clinical deficiency state, or disease, that I referred to above, is not the same as low vitamin D level. Clinical disease due to vit D issues implies low vit D levels; low vit D levels do not mean diseased state, nor correction of low vit D state means you'll prevent the disease, until proven so . We already went over this 3-4 times, other than bone/skeletal problems, the evidence for benefits of vit D supplementation is lacking.
I never said vit D wasn't dangerous, I said it wasn't a poison. Suresh said twice in this thread that high levels are dangerous. In that very brief that I posted there is piece of observational data suggesting increased risk of cancer associated with high vitamin D levels, something that I alluded to as a U-shape relationship. Did you notice it?
You idea of vitamin D supplementation for masses, while very humanistic, is conceptually wrong. It is not a win-win situation, as you portray it, you either benefit or nothing happens. You have to avoid high levels and vit D toxicity, so now you have to have regular blood tests and dose adjustments as vit D levels in any individual are variable and dependent on adipose tissue and sun exposure. So now an "innocent cheap supplement intake" becomes a lifelong medical management problem, with concerns for toxicity, expenses of recurrent blood test, discomfort of vein sticks - all based on what, few retrospective observations? Waste of healthcare dollars, if you ask me, but everybody feels great 'cause we're doing something, "omg, your D levels are low, but fear not, we'll take care of that, and we'll watch it like a hawk as long as you live".
Thanks for the response, I thought I lost you.
There's several problems here.
Once you have your blood tested for vitamin D and supplement to correct it the numbers won't change dramatically even with changes in the seasons.
This can be verified through organizations that do the blood testing.
Toxicity only happens in very rare cases and will be found out through the blood testing in the beginning.
The relationship between blood levels and vitamin D intake is not linear, it takes quite a bit to reach toxic levels and only in very rare cases would that ever happen, the blood test will always find this after a short amount of time with consistent supplementation.
Then there is the cost, you can have blood testing done in the beginning, find the level your at with the dose your taking and that's it.
Your blood levels won't just start going up unexpectantly, there won't be a lifelong management problem.
Doctors are prescribing 50,000 IU a week regularly now as they have gone over the studies and found this amount (7,000 IU a day) have had next to zero problems with toxicity while bringing the levels up to where so many studies have agreed to be effective for so many areas, increasing daily.
Though the studies aren't the best there are so many and most of them pointing in the same direction with very few showing anything negative.
After all, in some parts of the world people are getting 20,000 IU a day by being in sunny climates, no problems there for centuries.
Looking at it from another way, sunscreen, working indoors and limiting sun exposure have cut down dramatically the vitamin D produced and levels have fallen off. Many people are walking around with very low levels with no symptoms, they have to be tested. The other solution is just take about 2,000 IU a day and that probably won't be enough but would be safe as getting 5 minutes of sun a day in the summer.
I did see your U shaped comment, I disagree with that fully but didn't want to pick apart every sentence I could, that's not my purpose.
Many studies have found reduction of cancer( some more than others) to be reduced at generally over 40ng/ml and the number increasing at levels go up.
There's not much more that I could say, I'm hoping you'll look into it further, you're in a great position to help quite a few people from my perspective.
Hopefully you can stop by and post now and then, all viewpoints are appreciated.
Talker