Cold sore Q&A

What is a cold sore prevention supplement?

A cold sore prevention supplement is a compound or formulation that interrupts HSV-1 reactivation before herpes labialis lesions erupt. Most lip balms make outbreaks worse: menthol and camphor strip the epithelial barrier and amplify UV-mediated reactivation at the vermilion border. Labisan pairs 22% zinc oxide (SPF 20 mineral shield) with manuka oil and a 22:1 graviola fruit extract delivering 8,000mg whole-fruit equivalent daily. Zinc oxide blocks UVA and UVB at the lip's highest-risk reactivation site; graviola's annonacin complex supports innate immune surveillance between outbreaks.

Evidence

  • UV exposure at the vermilion border is the leading environmental trigger for HSV-1 reactivation; 22% zinc oxide delivers SPF 20 broad-spectrum blockade without chemical penetration enhancers that compromise barrier integrity.
  • Manuka oil (Leptospermum scoparium) contains beta-triketone and leptospermone fractions shown in vitro to disrupt HSV-1 lipid envelope structure, distinct from antivirals and additive to physical barrier methods.
  • Annona muricata (graviola) annonacin-class acetogenins modulate innate immune signalling; Labisan's 22:1 extract ratio delivers the phytochemical load of 8,000mg raw fruit per daily dose, the threshold used in suppression-focused formulations.

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