On the ole Buddies forum, I announced my own theory a few years ago that I personally could not see taking so much vitamin D and when I did try
the large dose, I felt like I had a virus. I also backed up my theory with muscle testing that I practice myself on a daily basis. Regarding Vitamin D supplements I can only take in
1000mg daily from supplement form whether it is a tablet or soft gel. Before the Vitamin D awareness campaign I took Cod Liver Oil and that worked great. I do much better and can digest the vitamin D
from the Cod Liver oil rather than the supplements.
Now I have some research to prove my theory.
Here is an older article that refers to Autoimmune illness and vitamin D
And here is the latest report from yesterdays Consumer Labs
Too much Vitamin D is not good.
from Consumer Labs
Raising low levels of vitamin D has many benefits. Among them is that levels of C-reactive protein (CRP), a marker of inflammation, decrease as vitamin D levels increase. However, increasing vitamin D levels beyond sufficient levels has a slight inflammatory action, as shown in a recent study. And even higher levels of vitmain D can result in hypercalcemia (too much calcium in the blood) with symptoms including constipation, confusion, weakness, loss of appetite and painful calcium deposits. For details about this and extensive information about vitamin D uses and dosage, see the Vitamin D Supplements Review, which includes our latest product tests.
If your vitamin D levels are low- " As discussed in the Vitamin D Supplements Review, a good target range for blood levels of vitamin D is 25 to 35 ng/mL, as this coincides with maximum benefit. If you are below this range, there is a rule of thumb for dosage you can follow to get you to your target level -- be sure to take vitamin D with your biggest meal of the day, as you'll absorb more due to fats in your food. Of course, you can also increase levels by a certain amount of sun exposure and/or consuming foods containing vitamin D." from Consumer Labs