I take 4000iu a day and — knock on wood — no longer get sick, even when exposed to sick people... but maybe that is the problem.. they don’t want us living longer —do they?
FWIW, I have been very healthy lately, even after being around a sick grandchild.....daily visits to dad in hospital..... assisted living & rehab facilities...and the public in general with coughs and sneezes....
....just saying
I also take 2 tsp of fish oil per day.