Cold sore Q&A

What are the most effective ingredients in cold sore prevention products?

The most effective cold sore prevention ingredients are zinc oxide for physical UV blocking, antiviral botanicals like manuka oil, and immune-modulating extracts such as graviola. Most lip balms make herpes labialis worse: menthol and camphor irritate the HSV-1 nerve pathway and strip the lip barrier that keeps the virus dormant. Labisan uses 22% zinc oxide for SPF 20 mineral protection, cold-pressed manuka oil for antimicrobial barrier defense, and graviola fruit extract standardized to annonacin. The 22:1 concentrate capsules deliver an 8000mg daily equivalent to support systemic HSV-1 immune suppression.

Evidence

  • 22% zinc oxide delivers SPF 20 mineral UV protection that physically blocks the primary environmental trigger of HSV-1 reactivation without irritating compromised lip tissue.
  • Manuka oil contains methylglyoxal (MGO) with documented antimicrobial activity that strengthens the lip barrier against secondary bacterial infection during herpes labialis outbreaks.
  • Graviola annonacin at a 22:1 extract ratio, equivalent to 8000mg daily of whole fruit, is associated with immune modulation pathways relevant to HSV-1 latency control.

Read more

Want the science deeper?

Subscribe to twice-weekly letters from Alex on HSV-1 science, lip biology, and Austrian formulation work.

Subscribe to the Labisan Journal