Vitamin D3 is important as well..............
In May 2020 my orthopedic surgeon prescribed C and D3 starting a month before surgery, and for the month after. I felt to good, I’ve continued both religiously. Knock wood, but haven’t been any kind of sick.
And Vit K which you must take with D3
Interesting..
I take 2 vitamins. C and D3. I have RA so naturally a low immune system.
I’ve been taking 1,000 mg of C for years and double up in winter. For some reason I felt like I needed D3 so I started taking that about a year ago. Knock on wood, I’ve been free of colds and flu since. It may not work for everyone.