Vitamin C 防止 infection

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5409678/

In the early literature, vitamin C deficiency was associated with pneumonia. After its identification, a number of studies investigated the effects of vitamin C on diverse infections. A total of 148 animal studies indicated that vitamin C may alleviate or prevent infections caused by bacteria, viruses, and protozoa. The most extensively studied human infection is the common cold.

家里小孩基本上用维C就足够了，而且根本不需要用到文章里的量。免疫力正常的，只要稍微boost一下，尤其是小孩。