It has been only recently that doctors started to be willing to accept D as a true antiviral and the D that doctors prescribed, mostly for bone health, was D2 which is synthetic and contains only a small part of the range of components as Sunlight D. D3 is naturally (plant) derived and much closer to sunlight induced D. Doctors who prescribed it also tended to prescribe very small doses. 2-400 units. As a virus prophylactic and for general health, 5000 units seems to be the gold. I take 10k when flu is “going around.” I probably don’t need that much but hey, the “adverse reaction” of an overdose seems to consist of a loss of appetite.
“. As a virus prophylactic and for general health, 5000 units seems to be the gold. I take 10k when flu is “going around.” I probably don’t need that much but hey, the “adverse reaction” of an overdose seems to consist of a loss of appetite.”
What everyone needs is to get their blood levels tested at least annually. Ideally one should be in the range 60-80 ng/mL, by my reading. Some people need more than 10k IU D3 daily, year round. Some need less. There are several factors. A competent MD will do the vit D3 test on every patient in their practice. There is no reason not to, except that healthy patients mean less drug use and less MD practice revenue.