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Regular vitamin C only slightly reduces severe cold symptoms, but not prevention

Evidence shows vitamin C doesn't generally prevent colds, but taking it regularly may reduce severe cold symptoms by about 10%. 1. A 2023 study identified that individuals consistently consuming a minimum of 1,000 mg daily experienced a 15% decrease in the severity of their cold symptoms. However, taking high doses over 1,000 mg daily can lead to issues like stomach problems or kidney stones.

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