The problem I have with national FDA/CDC/etc ranges is they assume people are healthy and do not have issues, or high stress, or infections, and so on.
Here is a cut and paste of parts of my 2020 Vit D and Covid19 research of research... going back to March.
Reference: “Vitamin D and Inflammation: Potential Implications for Severity of Covid-19” by E. Laird, J. Rhodes and R.A. Kenny, 11 May 2020, Irish Medical Journal."
"“Here we see observational evidence of a link of vitamin D with mortality. Optimizing vitamin D intake to public health guidelines will certainly have benefits for overall health and support immune function. Research like this is still exploratory and we need further trials to have concrete evidence on the level of vitamin D that is needed for optimal immune function. However, studies like this also remind us how low our vitamin D status is in the population (even in sunny countries) and adds further weight to some sort of mandatory vitamin D fortification policy. If the Nordic countries are allowed to do this, there is no reason Ireland, the UK or rest of Europe can’t either.”
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