Emergen-C may help reduce the length of a cold when taken in large doses. Vitamin C supports the immune system and helps fight off bacteria and viruses. Some nutrients in Emergen-C, like zinc and B ...

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 ...

Emergen-C products are dietary supplements that may be used to help support your immune system. Your immune system helps your body fight off infections. These products can contain a variety of ...

However, there are few products on the market that are proven to be effective against preventing a cold once it’s already started. As noted by Medical News Today, there’s no cure for a cold. Though ...

Science says, if you're already coming down with something, it's too late—and it doesn't work well as a preventative, either. Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds ...