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.
In a study where 11 healthy men took 500 mg of vitamin C twice daily plus 400 IU vitamin E for 4 weeks before being subject to strenuous aerobic exercise, the vitamin group had lower superoxide dismutase activity in their muscles versus the placebo group measured through a muscle biopsy.