thanks for the info Dan.  dee

On 29 Aug 2009, at 21:32, Dan Nave wrote:

Alfacalcidol is a form of vitamin D. It is converted rapidly in the
liver to the active metabolite, 1,25-dihydroxycholecalciferol
(calcitriol). In the normal situation it controls the intestinal
absorption of calcium and phosphate and plays an important part in the