I often wonder how fast the effect of vitamins is.
Let's imagine would could measure the level of Covid-19 symptoms with infinite precision. And let's imagine Vitamin D has a positive effect. And let's imagine we have infinitely large test groups.
Then how long after the intake of Vitamin D would we see a difference in symptom levels compared to the placebo group?
Would it take weeks? Days? Hours? Minutes? Seconds?
I mean, nursing home residents are typically older, meaning that they and everyone around them are more susceptible to the disease (meaning it's likely to spread faster and be more deadly). Black and brown people disproportionately work in service jobs where they get exposed to a lot more people; they're also less healthy on average than whites. It seems like there are other very likely causal factors than just vitamin D.
Let's imagine would could measure the level of Covid-19 symptoms with infinite precision. And let's imagine Vitamin D has a positive effect. And let's imagine we have infinitely large test groups.
Then how long after the intake of Vitamin D would we see a difference in symptom levels compared to the placebo group?
Would it take weeks? Days? Hours? Minutes? Seconds?