I was skeptical, but friends asked me to inquire.  To my surprise, there is significant published evidence that supplementation with vitamin C protects against viral infection, even corona viruses. Up to 500 mg twice a day is safe for daily life (take Mito-C), but at least 1,000 twice a day should be taken at the first symptoms of a respiratory infection. Combining vitamin K1 with the vitamin C should make it much more effective (Triumph).

Extra doses of vitamin C could benefit some patients who contract the common cold despite taking daily vitamin C supplements (1).

Intravenous vitamin C as adjunctive therapy for enterovirus/rhinovirus induced acute respiratory distress syndrome (2).

In particular, three controlled trials with human subjects reported a significantly lower incidence of pneumonia in vitamin C-supplemented groups,6 suggesting that vitamin C may affect susceptibility to lower respiratory tract infections(3).

1.     Biomed Res Int. 2018; 2018: 1837634.

2.     World J Crit Care Med. 2017 Feb 4; 6(1): 85–90.

3.     https://academic.oup.com/jac/article/52/6/1049/731701

From ProfRoc, Nutrition Investigator