Experts query latest advice on vitamin D supplementation

In a letter to the MJA, New Zealand endocrinologists said advice from the guidelines group, endorsed by peak professional bodies, applied such a broad definition of people at high risk that it “probably includes most adults”.

One of the letter authors, Associate Professor Andrew Grey from the University of Auckland, said only a minority of the population, including the frail and elderly in nursing homes and those sunlight-deprived for cultural reasons, were at risk.

He said the risk cut-off was about 20nmol/L, with people below that