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Does Emergen-C really help prevent or shorten colds?

Medically reviewed by Elizabeth Barnes, RDN Key Takeaways Emergen-C may help reduce the length of a cold when taken in large ...
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Can Emergen-C Actually Prevent a Cold?

Vitamin C in Emergen-C may not prevent colds, but could reduce symptom severity. Excess vitamin C can cause side effects like stomach cramps and diarrhea. Emergen-C contains other vitamins that may ...