If you travel for business or pleasure, you've seen the "travel supplement pack" marketing. Most of those are overpriced multivitamins. Here's what actually moves the needle on the four real travel stressors: jet lag, immune challenge, gut disruption, and skin/sleep dehydration.
1. Jet lag (timezone resync)
Melatonin
- Dose: 0.3-1mg (NOT the 5mg+ doses sold OTC, which are too high and disrupt natural rhythm)
- Timing: Take at destination bedtime — i.e., shift to local time immediately
- Duration: First 3-5 nights at destination; not for ongoing use
Light exposure
More important than melatonin for resync. Get sunlight as soon as possible after arrival in the morning at destination. Avoid evening blue light at destination dusk.
L-theanine + caffeine
Strategic morning caffeine helps shift the circadian rhythm forward. L-theanine smooths the caffeine effect.
2. Immune challenge (airplane cabin)
Airline cabins are immune stressors: 8-10% humidity (extreme dryness), recirculated air, close proximity to other passengers, sleep disruption. The day after a long flight, your immune system is genuinely weakened.
Pre-flight (24h before)
- Vitamin C 500-1000mg
- Zinc 15-30mg
- Quercetin 500mg (supports zinc transport into cells)
- eimele Shield Greens if you have it
During flight
- Hydrate aggressively — 250ml per hour
- Skip alcohol (compounds dehydration)
- Skip in-flight coffee after the first one
- Move every 90 min to support circulation
Post-flight (first 48h)
- Continue vitamin C + zinc
- Sleep extra — your immune system needs recovery time
- Avoid drinking with strangers in confined spaces (re-exposure to airplane bugs in a bar = a recipe for getting sick)
3. Gut disruption
Travel constipation is universal. Schedule changes, dehydration, low-fibre travel food, and unfamiliar bacteria all conspire.
Daily during travel
- Postbiotics — survive travel better than live probiotics; TheroNomic Tribiotic Gut Shield is shelf-stable for travel
- Magnesium citrate — gentle laxative effect helps if travel constipation hits; 200-400mg before bed
- Fibre supplement if hotel breakfasts are low on fruit/veg
- Manuka honey in tea — antimicrobial properties help if you encounter mild gut issues; BEE+ Manuka UMF15+
If something goes wrong
- Activated charcoal at first sign of stomach upset (binds toxins)
- Saccharomyces boulardii (yeast probiotic) for traveller's diarrhoea
- Electrolyte powder for rehydration
4. Skin / sleep dehydration
Skin
- Marine collagen daily — pre-flight + during travel
- Hyaluronic acid serum on skin during long flights
- Lip balm + nasal saline spray for cabin dryness
Sleep
- Magnesium glycinate at destination bedtime
- Earplugs + eye mask (non-negotiable in hotel rooms)
- Cool room temperature (most hotels run hot)
Practical packing list
For a 1-week trip, in a small zip pouch:
- Melatonin (0.3-1mg)
- Vitamin C tablets (small bottle)
- Zinc lozenges
- Magnesium glycinate
- Postbiotic capsules (shelf-stable)
- Activated charcoal (just in case)
- Manuka honey sachets if available, or small jar
- Pro Collagen+ capsules (travel-friendly format)
Skip: bulky multivitamin packs, anything refrigerated, anything you wouldn't actually use.
Frequently asked questions
Is melatonin safe for occasional use? Yes, at 0.3-1mg. Higher doses or daily long-term use is more debatable.
What about jet lag drugs? Prescription options exist but most travellers don't need them. Melatonin + light + caffeine timing usually does the job within 3-5 days.
Can I bring supplements through customs? Generally yes for personal-use quantities. Some countries restrict specific ingredients (CBD, certain herbal extracts). Check destination rules if you're carrying anything unusual.