Home Remedies for the Common Cold

Step 2 Vitamin C

My grandpaw was a biochemistry professor for decades, and always swore by ascorbic acid as a general cure-all and immune system booster. Since vitamin C is non-toxic and merely passes through your body, taking huge doses of the stuff can't really hurt you, even if it might not help either.

You can take it in pill form or by eating citrus fruit like lemons, limes, oranges, and grapefruits.