If you travel frequently, you know the feeling. Someone next to you on the plane is coughing the entire flight. You get home, days go by — and then it hits you out of nowhere. A scratchy throat, a runny nose, a cough that won’t quit. You were exposed on that plane, and your body just took a few days to show it.
What if instead of waiting for that to happen, you took action before and during your trip to give your immune system every advantage? That’s exactly what I do now — and this protocol has completely changed the way I travel.
The truth is, flying is a genuine immune system assault. You’re breathing recirculated air for hours, you’re dehydrated from low cabin humidity, your circadian rhythm is disrupted, and you’re in close proximity to hundreds of people from different environments carrying different pathogens. Your body is working overtime before you even land.
Once I understood that, I stopped treating travel sickness as bad luck and started treating it as something I could actually prevent. Here’s exactly what I do.
The prep work matters just as much as what you do mid-flight. I start supporting my immune system at least 24 hours before I fly.
Raw garlic and ginger are the first things I reach for. These aren’t glamorous, but they are profoundly effective. Garlic contains allicin, one of the most potent natural antimicrobial compounds we know of. Ginger is a powerful anti-inflammatory and has been shown to support immune cell activity. I chop raw garlic and eat it with food — not cooked, because heat destroys the allicin — and I’ll either juice fresh ginger or chew a small piece. Do this the day before and the morning of your flight.
Oil of Oregano is my other pre-flight staple. I consider it nature’s antibiotic. It contains carvacrol and thymol, two compounds with well-documented antimicrobial and antiviral properties. I start this the day before I fly and continue through the trip.
Thymosin Alpha-1 is a peptide that directly modulates immune function and has been used clinically in the treatment of viral infections and immune deficiencies. I use it as a nasal spray before travel as a proactive immune primer. This can be one of the most powerful tools and one that most people haven’t heard of yet.
This is where most people do nothing. I do everything.
Keeper’s Naturals Propolis Immune Spray goes straight to the back of my throat the moment I sit down and again before landing. Propolis is what bees use to sterilize their hive — it has remarkable antibacterial and antiviral properties and creates a protective barrier in the throat, which is one of the first entry points for pathogens.
Dr. Berg Organic Black Seed Oil is one of my non-negotiables. Black seed oil (Nigella sativa) has been studied extensively for its immune-modulating effects. It’s anti-inflammatory, antiviral, and supports respiratory health — all critical when you’re sitting in a metal tube breathing recycled air for hours.
Cat’s Claw liquid drops are in my bag for deep immune support. This Amazonian herb has strong antiviral and anti-inflammatory properties and works particularly well against viral pathogens. I take it throughout the flight.
Kepos Human Milk Equivalent Superfood might be the most unique thing on this list. This prebiotic protein supplement was developed to mirror the bioactive compounds found in human breast milk — the same compounds that build and regulate infant immune systems. Since roughly 70% of your immune system lives in your gut, keeping the gut microbiome supported during travel is critical. Cabin pressure, disrupted eating schedules, and stress all compromise gut health. Kepos helps keep mine protected.
Hydration is non-negotiable. Cabin humidity typically sits between 10–20%, far drier than even desert air. Your nasal passages and mucous membranes — your first line of defense against pathogens — dry out quickly. I drink water consistently throughout every flight and avoid alcohol entirely when I’m trying to stay healthy.
The work isn’t done when the wheels touch down. In fact, some of the most important steps happen right after you land.
Isotonic nasal spray by Quicksilver Scientific is the first thing I reach for. Your nasal passages accumulate everything you’ve been breathing for the past several hours. I use the isotonic spray to rehydrate the nasal mucosa.
Colloidal silver nasal spray is my other post-flight nasal tool. Silver has natural antimicrobial properties and using it nasally helps clear anything that made it past the first rinse.
Gargling warm salt water is one of the oldest and most underrated immune practices. Salt creates a hyperosmotic environment that draws fluid out of pathogen cells, effectively killing or neutralizing them. I gargle for at least 30 seconds, morning and night, and especially after any long travel day.
KPV peptide spray is another tool I sometimes use post-flight. KPV is a tripeptide fragment of alpha-MSH with potent anti-inflammatory and antimicrobial properties. It helps calm any inflammatory response triggered by travel and supports mucosal immunity.
Even with the best protocol, sometimes you feel that first hint — a slight scratch in the throat, a little extra fatigue, the beginning of a runny nose. This is the moment most people ignore it and hope it goes away. I treat it as a five-alarm fire and act immediately.
Here’s what I do the second I feel anything:
Double everything. Oil of oregano dose goes up. Garlic intake goes up. Salt water gargles go to three to four times a day. Propolis spray becomes constant.
Thymosin Alpha-1 and KPV get added or increased immediately. These peptides work best when deployed early. Thymosin Alpha-1 ramps up immune surveillance and response. KPV calms the inflammatory cascade that makes you feel terrible.
Raw garlic — Yes it’s intense but it’s better than getting sick.
Rest aggressively. This sounds obvious but it’s the step most people skip. Sleep is when your immune system does its heaviest lifting. Getting to bed early the moment you feel off is one of the most powerful interventions you have.
Cut sugar completely. Sugar suppresses immune function almost immediately after consumption. The moment I feel something coming on, sugar is gone entirely — including fruit juice, alcohol, and anything processed.
Hydrate beyond what feels necessary. Thin mucus is protective mucus. Staying aggressively hydrated helps your body flush pathogens and keeps your respiratory lining functioning properly.
In most cases when I catch it early and execute this protocol, symptoms resolve within 24 hours or never fully develop at all.
Most people treat their immune system like a passive system — something that either works or doesn’t. I treat mine like something I actively train and support, especially around travel.
The combination of targeted supplementation, peptide support, mechanical interventions like nasal rinsing and salt water gargling, and basic foundations like hydration and sleep isn’t complicated. But it requires intention. And once you build the habit, it becomes second nature.
Save this one. Your future self on the next flight will thank you.
Want the exact links to everything I use? See Links Below and can use code Biohackerblondie for Keps and Ultralife Peptide discount…
Jenny Jones is the founder of Happier Health Supplements, host of the BiohackerBlondie Podcast, and author of Biohack For Life.
This post is for informational and educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before beginning any new supplement protocol.
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