It takes about two days to get a cold after exposure to the virus. In this video, Larry Gooss, DO, a family practice doctor at Chippenham & Johnston-Willis Hospitals, explains how virus can continue to live on surfaces.
A RealAge answered. To prevent vitamin C deficiency, government guidelines recommend a daily dose of 90 milligrams (mg) for men, 75 mg for women. We recommend that you get 1,200 mg of vitamin C per day from food and supplements. This higher amount not only prevents deficiency but also helps prevent disease and needless aging.
The rates of production by a number of different animals like the cat, dog and goat have been measured. The heavier the animal the more vitamin C it produces. However, a 154-pound man would need to produce between 1.75 and 3.50 grams per day to keep up with the other animals. Loading tests have shown that 20 to 25 percent of a 1 gram per day dose shows up in the urine within 6 hours. When much larger doses are taken, as much as 62 percent can show up within hours.