Cold sores, also known as fever blisters, tend to occur during times of emotional or physical stress. While no drug or supplement can permanently eliminate the herpes simplex virus--the underlying cause of cold sores--several nutritional supplements can help to reduce the frequency and duration of cold sore outbreaks. Dietary supplements may help to address the underlying nutritional deficiencies that contribute to the development of cold sores. Additionally, antiviral herbal medicines can help to disrupt the herpes simplex virus, often with few or no side effects. People suffering from cold sores should recognize that the herpes simplex virus is contagious; supplements will not prevent the virus from infecting others.
Lysine
The amino acid lysine (or L-lysine) may help to prevent outbreaks of herpes simplex 1 and other herpes-family viruses. The U.S. National Institutes of Health (NIH) recommend lysine supplements or a high-lysine diet to some people who suffer from frequent cold sores. However, the NIH also warns against the use of lysine supplements for people suffering from cardiovascular disease. Good dietary sources of lysine include blue corn, fish, eggs, chicken and potatoes.
Lemon Balm
A potently antiviral member of the mint family, lemon balm teas and oils can help to combat the herpes simplex virus. A September 2008 study in the medical journal Phytomedicine concluded that lemon balm effectively reduces symptoms and outbreaks of the cold sore virus. Herbalists may recommend teas,capsules, tablets or topical treatments made from lemon balm as a treatment for cold sores.
Garlic
According to a 1992 study at Brigham Young University, garlic effectively combats the herpes simplex virus, making it a possible treatment option for people with frequent cold sores. However, the study involved very high doses of garlic extract; large doses may be necessary for achieving optimal results. Topical applications of garlic oil or garlic peel may also be effective.
