http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm controversial topic http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm Doctors say http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm nlm.nih http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm nlm.nih Doctors say http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm Vitamin C and the common cold http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm Research has yet to point to any proof http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm Vitamin C and colds http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm Doctors say http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm questioned http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm common cold questioned http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm http://www.nlm.nih.gov/medlineplus/ency/article/002145.htm