Vitamin D was also held up as a wonder drug for long enough too. Again now there are questions as to the value of it, especially in terms of supplementation.
Pregnant women should avoid taking vitamin D supplements. Substitution appears to raise the risk of children developing a food allergy after birth. This was the conclusion drawn from a new survey carried out by the Helmholtz Centre for Environmental Research and the Martin Luther University in Halle-Wittenberg in Germany which was published in the February issue of the medical journal Allergy.
I am sure we could question the methodology of the study, but it is interesting nevertheless.