[internet_points]

Yeah I took vitamin D all through my kids' nursery years, every morning, had strong belief in it.

I still was sick all the time. That combination of not enough sleep (kids crying in the night etc.), work stress and insane amount of viruses from nursery is killer.

[mixmastamyk]

Not enough info, maybe bad brand or dosage. Maybe you have other immune issues.

Not well known but there are people who simply can not absorb D thru the gut. A high school friend is one. Shouldn’t discourage the 90%+ who can benefit because of exceptions.

[internet_points]

Alternatively, I might have been even more sick if I didn't take vitamin D!