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Does Lysine Help Cold Sores?

Maya Lin-Takahashi • • 7 min read
Does Lysine Help Cold Sores?

Lysine is not a cure for cold sores, but it may help prevent and shorten the duration of an outbreak. A person should continue to take any antiviral medications

antiviral medications
Antiviral drugs are a class of medication used for treating viral infections. Most antivirals target specific viruses, while a broad-spectrum antiviral is effective against a wide range of viruses. Unlike most antibiotics, antiviral drugs do not destroy their target pathogen; instead they inhibit its development.
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a doctor prescribes for their cold sores. Those interested in adding lysine supplements to their routine should speak to their doctor beforehand.

How quickly does lysine work on cold sores?

In a 2005 study of 30 patients, scientists found that cold sores cleared up in 40% of participants after three days of using a lysine- and zinc oxide-based ointment. 4 By the sixth day, cold sore symptoms were resolved in 87% of patients.

How much lysine should I take for a cold sore?

For cold sores (herpes simplex labialis): 1000 mg of lysine taken daily in up to two divide doses for up to 12 months, or 1000 mg taken three times daily for 6 months has been used. For preventing cold sores from recurring, 500-1248 mg taken daily or 1000 mg taken three times daily has been used.

Maya Lin-Takahashi
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Maya Lin-Takahashi

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.