re: Vitamin C D and Zinc

You are right about these vitamins. I take 5,000 IU of D3, 50 mg of zinc, 90mcg of MK7 (K2), 2,000 C, and 600 mg of NAC each day. A year ago my D level was 22. Within 6 months it was up to 43. The cut off is 30, so you want to be above that level. I have done this the entire year of 2020 and so far made it through. I'm 66 just for age reference.