The amount recommended is insufficient for most people to get to the level where (correlation) has shown significantly reduced risk - that is >30 ng/ml (>75 nmo

The amount recommended is insufficient for most people to get to the level where (correlation) has shown significantly reduced risk - that is >30 ng/ml (>75 nmol/l) Another thing that is tricky is that it really depends how much you need to take on what your levels are personally. We know that the amounts they recommend are completely long term safe for everyone and long term good enough to avoid severe deficiency. But for most people there will still be insuficiency - the necessary average is actually around 2000 IU (for some people it should be up to 4000 IU, others less)