Efficacy of daily and monthly high-dose calciferol in vitamin D–deficient nulliparous and lactating women
I very frequently get questioned on the doses of Vit D that I recommend to patients. While these dosages vary from patient to patient, a dosage of 2,000 IU / day is becoming a pretty standard recommendation. Many patients think that this is a very high dose. However, we are seeing more and more patients where 2,000 / day is not enough.
This study backs up these observations, finding that 2,000 IU / day for 3 months was safe, but researchers found that very few women were able to get their serum levels above 50 nmol /L, suggesting that we are going to need to rethink our recommendations again. However, keep in mind that these researchers used Vit D2, which is proven to be an inferior source of D.