It's just vitamin d and c right?
> Maintaining a robust immune system through optimum vitamin D and zinc levels, and adding vitamin C at the onset of cold symptoms, can help reduce cold symptoms and/or duration.
It's just vitamin d and c and zinc.
> Maintaining a robust immune system through optimum vitamin D and zinc levels, and adding vitamin C at the onset of cold symptoms, can help reduce cold symptoms and/or duration.
It's just vitamin d and c and zinc.
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