Vitamin C has often been thought to decrease the risk of the common cold, but the most recent studies show that is only effective in reducing the risk of the common cold for people exposed to brief periods of strenuous physical exercise for short durations. What does this mean exactly?
Taking an extra 500 mg of vitamin C won’t really help reduce the risk of a cold unless you are about to undergo an arduous physical task such as a marathon. On the other hand, some recent studies have found that daily doses of 1-2 grams of vitamin C have shown promise in reducing the duration of colds already in progress.
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