[aMorePerfectUnion]

They tested a dose of 400 iu per day.

That’s a piss-poor dose of D3.

I take 5,000 iu per day in the summer
I take 10,000 per day in the winter.

I’ve done this for +20 years.

[steve86]

You got it++++++

[dmzTahoe]

I’ve been told that magnesium supplements should be taken along with vitamin d3.

What say you?

[ImaGraftedBranch]

10000 iu D3 per day since last March. 50mg zinc, 500mg Quercetin and 1000mg C.
Every day. My wife and I live normal lives and never worry about getting sick.