I was concerned that he may be absorbing too much calcium, as a result of too high a vitamin D level. Other bloggers have posted about this for example Jenny on Diabetes Update in this post “Too much calcium and vitamin D => Trouble” She writes about a condition called “Milk Alkali Syndrome” and her experience with it after increasing her vitamin D… ‘caused by the combination of high calcium and high Vitamin D and that the recent spike in cases has been caused by the recent fad of people supplementing with high levels of Vitamin D.’ (‘Calcium supplements can increase risk of kidney failure‘)Read more here.
And from Dr William Davis: “Here’s a curious observation I’ve now witnessed a number of times: Some people who supplement this (1200mg day) dose of calcium while also supplementing vitamin D sufficient to increase 25-hydroxy vitamin D blood levels to 60-70 ng/ml develop abnormally high levels of blood calcium, hypercalcemia.” (‘Increased Blood Calcium and vitamin D’)
Paul Jaminet also writes in this post “Some people over-do vitamin D supplementation and/or calcium supplementation. Elevated blood calcium levels, which can be brought about by too much vitamin D, will cause constipation. If you supplement either vitamin D or calcium and have constipation, ask your doctor to check serum 25OHD, 1,25D, and calcium levels.”.
So Vitamin D can cause problems other than the toxicity that is talked about in the medical mainstream.