Deep-research letters on HSV-1, cold sores, and lip biology. Twice a week. From Alex.
The cold sore science most dermatologists never get into. The lip barrier mechanics behind why most balms fail at altitude. The graviola pharmacology behind real immune support. The Austrian formulation file behind Labisan, written by Alex from Salzburg.
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What subscribers actually get
- Two emails a week. One main long-form deep-dive on cold sore mechanisms, HSV-1 biology, or graviola pharmacology. One shorter midweek field note on a specific trigger, ingredient, or recovery protocol.
- Specific compound names. Acetogenins, annonacin, annomuricin A, quercetin, zinc oxide micronisation, hydroxypropyl methylcellulose. Real chemistry, not marketing slogans.
- Real clinical numbers. "40 to 60 percent outbreak reduction with daily mineral SPF 15+." "Cabin humidity 10 to 20 percent equals 8 hours sun exposure for lip tissue." Cited, not made up.
- Honest comparisons. Labisan vs Carmex, vs Abreva, vs Zovirax, vs Compeed, graviola vs acyclovir, graviola vs lysine. Including when Labisan is not the right answer.
- Austrian pharma context. EU GMP standards, the FDA 2024 OTC monograph on mineral vs chemical sunscreens, the regulatory loopholes that let "proprietary blends" hide active doses on US shelves.
- Subscriber-only product runs. Early access to limited batches, members-only pricing on the lip balm 3-pack and graviola 90-day supply, and pre-launch testing for new formulations.
Topics Alex writes about
The newsletter is structured around four research clusters. Each cluster has weeks of letters behind it and weeks more queued up.
HSV-1, HSV-2 and cold sore science
What herpes simplex virus type 1 (HSV-1) actually does in the trigeminal ganglion between outbreaks. How HSV-1 differs from HSV-2 in lip vs genital presentation. The 5-stage cold sore lifecycle (prodrome, blister, ulcer, crust, healing). Why some carriers get 1 outbreak a year and others get 6. Stress, UV, fever, hormonal triggers and how each one activates viral reactivation. Honest answers on cure research, suppressive therapy, and where supplements actually help. See the full cold sore science archive and our 45-question cold sore FAQ.
Lip barrier biology and SPF chemistry
Why lip tissue has 3 to 5 cell layers of stratum corneum vs 16+ on the rest of your face, and what that means for moisture loss, UV damage, and chapping. The 90-minute SPF reapplication rule almost nobody follows. Mineral (zinc oxide, titanium dioxide) vs chemical (oxybenzone, avobenzone) sunscreens, including the FDA 2024 OTC monograph. Why beeswax-only balms fail at altitude. The science behind the 22 percent zinc oxide formula.
Graviola pharmacology (Annona muricata)
The 100+ annonaceous acetogenins identified in graviola leaf. Purdue School of Pharmacy work on Complex I mitochondrial inhibition. Quercetin, kaempferol, and the antioxidant flavonoid profile. Real differences between 22:1 leaf extract and raw leaf powder. Cycling protocols (one year on, one year off), realistic daily dosing, and the difference between fruit and leaf extract safety. Read the full honest acetogenins-and-herpes answer.
Austrian heritage and formulation transparency
The Labisan family story from Salzburg, Austria (Nascyma Pharma GmbH, Vienna, brand born 1931, on the 1953 Austrian Everest expedition). Austria's EU GMP pharmaceutical-grade manufacturing vs the cosmetics-grade standards most US lip balms run on. Why the HPMC capsule shell matters more than most "actives." Heat-stable formulation work done in an alpine Austrian pharmacy context. The difference between marketing claims and what is actually in the bottle.
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Twice a week. Plus 10% off your first order in the welcome email.
Recent letters from Alex
The most recent eight sends. Subscribers got these in full; the archive shows you the angle.
Your SPF has a 20-minute blind spot
Zinc oxide vs chemical sunscreen, the FDA 2026 OTC monograph on mineral filters, why chemical SPF needs 15 to 20 minutes to activate, and how that gap turns into a cold sore prevention failure.
Four days before the wedding. There it is.
Outdoor event season and the wedding-day cold sore problem. The HSV-1 hybrid system (lip balm outside, graviola inside) for outbreak suppression in the 7 to 14 days before a high-visibility event.
The cold sore you get when you finally relax
Summer holiday cold sores, the leisure immune paradox (why your body crashes when stress lifts), water UV duration, and the prodrome window most carriers miss.
Your trip is 7 days. A cold sore lasts 14.
The 5-stage HSV-1 lifecycle (prodrome, blister, ulcer, crust, healing). Trigeminal nerve reactivation mechanism. The graviola pre-loading protocol for trip prevention.
Your lip balm wore off hours ago
The 90-minute SPF reapplication rule almost nobody follows. Summer UV season transition mechanics for lip tissue.
Your kit cost €2,000. Your lip balm cost €3.
Gear mentality for outdoor sports. The exercise-induced immune window and how astaxanthin and graviola plug it.
I counted the lip balms in my Austrian pharmacy
EU GMP pharmaceutical-grade vs cosmetics-grade manufacturing standards. The "proprietary blend" labelling loophole. The dual-product (lip balm plus graviola) stack rationale.
The three ingredients making your cold sores worse
Menthol, camphor, and phenol ingredient audit. HSV-1 trigger mechanics. Why "cooling" ingredients can extend an outbreak by 3 to 5 days.
Frequently asked questions
Yes. Cold sores (also called fever blisters or herpes labialis) are the visible outbreak of HSV-1 infection on or near the lips. Roughly 67 percent of adults under 50 carry HSV-1 according to WHO estimates, but most never read a single letter about how the virus actually behaves between outbreaks. Our cold sore lifecycle protocol walks through the full 5-stage cycle. The newsletter goes deeper.
HSV-1 and HSV-2 are both herpes simplex viruses with very similar genomes, but they have different preferred tissue sites. HSV-1 primarily causes oral herpes (cold sores on lips, face, mouth). HSV-2 primarily causes genital herpes. Cross-infection happens in both directions and is increasingly common. The newsletter covers the diagnostic and behavioural differences in depth.
You can substantially reduce outbreak frequency, but you cannot cure HSV-1 with currently available science. Daily mineral SPF lip protection has shown 40 to 60 percent outbreak reduction in clinical reviews of sun-triggered cases. Stress and immune-system management compound that further. See the 12-month HSV-1 outbreak reduction mechanism and our 8-week trigger journal protocol. The newsletter goes deeper on prodrome interruption and what current cure-research labs are working on.
Graviola has antiviral and immune-modulating compounds (annonaceous acetogenins, quercetin, kaempferol) with in-vitro activity against several enveloped viruses. The clinical evidence in HSV-1 specifically is limited, and any claim that graviola "cures" herpes is not supported. What graviola does offer is broad immune resilience, antioxidant defence, and a reduced background-stress profile that can lower outbreak frequency for many carriers. Read the honest acetogenins-and-herpes answer.
Three reasons. First, most lip balms are beeswax-and-petroleum bases with no real UV protection at all. Second, the few that do contain SPF use chemical filters that degrade quickly under sustained UV at altitude. Third, almost none are designed for sub-zero application and high-wind environments. Mineral zinc oxide stays photostable, applies cleanly in the cold, and does not need a 20-minute activation window. Read the deep-dives on beeswax-only lip balm altitude failure and the 90-minute SPF reapplication rule.
No. Roughly 80 percent of each letter is research, science, and honest category critique with zero product mention. The remaining 20 percent is the product context when it is genuinely relevant. The newsletter has explicitly covered cases where Labisan is not the right answer (very mild infrequent outbreaks, severe diagnosed cases requiring prescription antivirals, allergies to mineral filters). If the science does not support a product choice, the letter says so.
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Written by Alex, brand director at Labisan since the family handover.
Labisan is a brand of Nascyma Pharma GmbH, Vienna. EU GMP pharmaceutical grade since 1931. On the 1953 Everest expedition.