Vitamin C shows moderate influenza inhibition
Márquez-Domínguez L, Reyes-Leyva J, Herrera-Camacho I, Santos-López G, Scior T. Five Novel Non-Sialic Acid-Like Scaffolds Inhibit In Vitro H1N1 and H5N2 Neuraminidase Activity of Influenza a Virus. Molecules. 2020;25. doi:10.3390/molecules25184248
Vitamin treatment showed mixed results
Liu MJ, Han ZY, Wang HW, Yu CL, Xu XL, et al. [Effect and mechanism of acupoint injection on influenza A virus induced pneumonia in mice]. Zhongguo Zhen Jiu. 2022;42:1017. doi:10.13703/j.0255-2930.20210713-k0002