It is the more serious statement that nobody has looked, and the biology that drives the healing signal is the same biology that warrants the question
PubMed , Hypoallergenic Hotel Rooms | Pure Wellness
8.1.4 Research limitations and considerations While the evidence is compelling, several limitations must be acknowledged, including the reliance on observational studies for human data, potential confounding factors in epidemiological investigations, and the extrapolation challenges from animal models to human populations
Many adults can focus on reaching a reasonable daily intake of vitamin D through food, sunlight and modest supplements, without testing levels first, as long as they do not have specific risk factors
Your liver performs a small conversion step to make it bioactive, which is a normal physiological process for healthy adults
It can take a few weeks to start seeing improvement, with the best results often appearing several months after treatment