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.
Even if you take more than the daily recommended dose, your body is usually able to flush out the extra amount so that you donât get a toxic buildup of vitamin C in your body. Extremely high amounts of vitamin C are considered to be more than 2,000 mg daily for adults. You may notice certain side effects such as diarrhea, nausea, and kidney stones. How much vitamin C should be taken to fight off a cold? For normal, healthy adults, the daily recommended amount is 75 mg for women and 90 mg for men. For young children up to 3 years of age, the recommended amount is 15 mg per day and is 25 mg per day for children between the ages of 4 and 8. In cases of pregnancy and breast feeding, the daily recommendations are higher.