TJ,
I just went through some of your recent posts. You've been taking Vit D for a long time. Some people do not do well with it. My friend started getting horrible pain everywhere and depressed until she totally stopped it all. Every time she tried it the same thing happened.
It may have nothing to do with how you feel, but it's something to consider.
I am concerned about this new bandwagon of Vit D being the cure for all ills and in high doses. While I take it myself and acknowledge it can have benefits, I am concerned that there are no long-term studies on people taking such high doses for such long periods of time. And I am also worried because anytime we take large doses of one nutrient, we can cause imbalances of others. The majority of the studies are coming from one source--Cannell--and he is also telling people now that taking Vit A with D will decrease it's effectiveness. Yet Vit A exists with D naturally in fish oil. There are others who say this is dangerous advice, because it's necessary to have all the fat-soluble vitamins together (A, D, and K) and in balance so as to prevent toxicity of any of them alone.
And then there is the whole subject of L-form bacteria which many of us may be carrying around that is only detected by specialized testing. They are starting to think that these CWD (cell wall deficient) bacteria are the underlying cause of many chronic health problems. And those who do have these find their condition worsens when taking Vit D due to an aberration of the Vit. D receptor.
This website is fascinating reading by Amy Proal, who has a degree biology and suffered from Chronic Fatigue Syndrome by following the Marshall Protocol, which itself is controversial. But there is no doubt that many people have gotten great relief from following it, and it involves cutting out all sources of Vit D as part of the treatment.
http://bacteriality.com/2007/09/15/vitamind/There are critics of the MP approach, but there are also critics of the current Vit D recommendations also. I personally do think the CWD bacteria are a bigger problem than anyone realizes and that Vit D can adversely impact those who are infected with them. And separate from that, I think that one day we will find that these high dose Vit D recommendations, without addressing concurrent deficiencies in Vit A and K, will worsen or cause deficiencies of those other vitamins which will have adverse effects on health.
More studies are needed in all areas.