Vegemite and Marmite for Cold Sores: What You Need to Know

Vegemite and Marmite are yeast extract spreads widely enjoyed in Australia and the UK, respectively.

Over time, they have gained attention as folk remedies for mouth ulcers and cold sores.

While many people share personal stories of relief, scientific evidence supporting their effectiveness for treating cold sores is lacking.

This article explores the anecdotal uses of Vegemite and Marmite for cold sores, their nutritional properties-including lysine and B vitamin content-and why established medical treatments remain the best approach.

Some individuals, including Australian blogger Mel Watts, report applying Vegemite directly onto cold sores or mouth ulcers, claiming it reduces pain and speeds healing-sometimes within a day.

This effect is thought to stem from Vegemite’s high salt content, which can temporarily numb pain but also causes a strong stinging sensation.

Despite these personal accounts, there is no clinical research confirming that Vegemite has antiviral properties or can heal cold sores.

The stinging and drying caused by its salt may reduce discomfort temporarily but does not address the underlying herpes simplex virus infection.

Vegemite contains several B vitamins (B1, B2, B3), but notably lacks vitamin B12, which some studies associate with healing certain types of mouth ulcers.

Vegemite and Cold Sores: Anecdotes and Reality

Marmite is a similar yeast extract spread popular in the UK and New Zealand.

Unlike Vegemite, Marmite contains vitamin B12, which has been linked in some small studies to reduced recurrence of aphthous ulcers (canker sores), though not specifically herpes cold sores.

Like Vegemite, Marmite’s topical use for cold sores or ulcers lacks scientific validation.

Anecdotal reports are mixed-some users find it soothing, while others experience irritation or worsening of symptoms.

Marmite and Cold Sores: Similarities and Differences

Both Vegemite and Marmite are rich sources of B vitamins, essential for energy metabolism, nervous system function, and immune health.

Marmite’s vitamin B12 content makes it particularly valuable for vegetarians and vegans who may be at risk of deficiency.

These spreads also contain lysine, an amino acid that may help inhibit herpes simplex virus replication by competing with arginine, which the virus uses to reproduce.

However, typical serving sizes (about 5 grams) provide only modest amounts of lysine, unlikely to significantly impact herpes outbreaks on their own.

Including Vegemite or Marmite as part of a balanced diet can contribute to overall nutritional health, especially for those following plant-based diets, but they should not be relied upon as treatments for cold sores.

Health Benefits of Yeast Extract Spreads

• There is no scientific evidence that applying Vegemite or Marmite directly to cold sores cures or heals them.
• The salt content may provide temporary pain relief but also causes stinging and irritation.
• Vitamin B12 in Marmite may help reduce some types of mouth ulcers when ingested but is not proven effective for herpes lesions.
• Vegemite lacks vitamin B12 but provides other important B vitamins.
• Medical treatments and antiviral medications remain the recommended approach for managing cold sores.
• Consult healthcare providers rather than relying solely on folk remedies.

Summary and Recommendations

Vegemite is known for its preservative qualities and does not mold easily, but this does not translate to antiviral effects.

Some families use salt or salty spreads as traditional remedies for ulcers, but these methods are anecdotal and not scientifically proven.

For effective cold sore management, clinically proven antiviral medications, proper hygiene, and supportive care are essential.

While Vegemite and Marmite can be enjoyed as nutritious food items, they should not replace medical advice or treatment.

Additional Notes

Vegemite and Marmite are beloved pantry staples with some anecdotal use for mouth ulcers and cold sores.

Their nutritional benefits, especially B vitamins, can support overall health, particularly in vegetarian and vegan diets.

However, there is no scientific evidence that they can cure or heal cold sores, and topical application may cause discomfort.

For managing cold sores effectively, it is best to rely on proven antiviral treatments and consult healthcare professionals.

Including Vegemite or Marmite as part of a balanced diet may offer nutritional support but should not be considered a substitute for medical care.