2000IUs/day only got me to 52ng/mL from low 40s, so I bumped it to 5000IU. Also been wearing sunscreen more consistently hence the bump. I am worried about calcification issues associated with vit d3 so I've started taking mk-7 in addition to the k1 from a multi.
K2(MK7) is a good idea, and K2 from calf or chicken liver, bone marrow, cheese and butter from grass fed animals is maybe better.
Dr Hollick(DukeNukem's video on another Vit D thread and Dr Heaney(Matt's video on this thread) don't worry about calcification for the normal reference blood. The reason is the increase in calcium uptake levels off after reaching about 49 ng/mL. Dr Heaney's video is longer, but as informative as Dr Hollick's.
Krillin has a chart with a U shaped mortality curve. That chart makes 49 ng/mL a good choice for a target level of vitamin D25(0H). The curve is a U, not a J. It would be a J if the increase of calcium uptake did not level off at 49 ng/mL. A good target because if there are benefits above 49 ng/mL why don't they show up in Krillin's chart?
Vitamin D intoxication requires multiples of the level that lifeguards receive. Most cases known are when big mistakes are made in manufacturing Vitamin D pills.
Edited by david ellis, 28 March 2009 - 07:50 PM.