We all know our Vitamin C, most of us attributing it to every sour fruit or vegetable we eat. There’s also this old tale that’s been doing the rounds for years about Vitamin C helping keep away colds and such, with some swearing by it’s curative effects. Then there was this whole study about how the super-curative effects of Vitamin C were nothing but a housewives tale and that Vitamin C while useful to the body had no such properties.
Cut to 2017, when a paper was published that spoke about the positive effects of Vitamin C on infections. According to this paper, the studies that turned up fruitless in their pursuit of Vitamin C’s extra-curative properties might not have been using a high enough dose. Various controlled trials however found 
- a positive and significant dose-response for the duration of common cold symptoms (6 to 8g per day),
- an ability to prevent pneumonia
- treatment benefits for pneumonia patients
- treatment benefits for tetanus patients
For details, see this very interesting paper. For those of you who may not have the time to read the paper, it may be worthwhile to tank up on Vitamin C when you have your next cold.