In 2019, I found myself standing in a 7-Eleven in Shinjuku at 3:45 AM, trying to decide if a vacuum-sealed soft-boiled egg was a breakfast food or a cry for help. I hadn’t slept in twenty-six hours. My brain felt like a wet sponge being squeezed by a giant hand. I had followed every piece of advice from those glossy travel magazines—I drank the hibiscus tea, I wore the compression socks, and I took enough melatonin to sedate a medium-sized horse. None of it worked. I was vibrating with exhaustion but my eyes wouldn’t stay shut. That was the moment I realized that most ‘natural’ remedies for jet lag are just expensive ways to have slightly more colorful urine while you stare at the ceiling in a foreign hotel room.
I’m not a doctor. I’m just a guy who has spent way too much time in middle seats and has a weird obsession with tracking my sleep data on a Garmin Fenix 6S. After that Tokyo disaster, I spent three years experimenting. I tested different protocols on six long-haul flights (mostly JFK to HND or LHR). I tracked my sleep latency—that’s just a fancy way of saying how long it takes to pass out—and my heart rate variability. What I found is that the only natural remedy for jet lag that actually matters has nothing to do with what you put in your mouth, and everything to do with when you stop putting things in your mouth.
The 16-hour fast is the only thing that works
Most people think jet lag is just about being tired. It’s not. It’s a total desynchronization of your internal clocks. You have a master clock in your brain, but you also have peripheral clocks in your gut. When you eat a tray of salty ‘chicken or pasta’ at 2 AM over the Atlantic, you are telling your gut it’s lunchtime while your brain thinks it’s the middle of the night. You’re basically tearing your body in two directions.
What I mean is—actually, let me put it differently. You need to reset your food clock to match your destination. I started using a method often called the Argonne Diet, but I simplified it because I’m lazy. Here is the data from my last three trips: when I fasted for 16 hours before my first ‘breakfast’ at the destination’s local time, my resting heart rate returned to baseline within 14 hours of landing. When I ate the plane food? It took 56 hours. That is a massive difference.
If you eat the plane food on a long-haul flight, you deserve the three-day fog.
I know people will disagree with this. They’ll say they get ‘hangry’ or they need the energy. I used to think that too. I was completely wrong. Being hungry for a few hours is a minor inconvenience compared to being a zombie for three days. The ‘natural’ part of this is just letting your body’s evolutionary machinery do its job. Your body is designed to stay awake when food is scarce so you can hunt. Use that. Don’t eat the pasta.
Melatonin is a doorbell, not a sledgehammer
Melatonin is the most misunderstood supplement on the planet. People take 5mg or 10mg doses, which is honestly insane. Your body naturally produces a fraction of a milligram. When you take a massive dose, you’re not helping; you’re just flooding the receptors and making yourself feel groggy the next day. Anyway, I digress. The point is that melatonin isn’t a sedative. It’s a signal. It’s like a doorbell telling your brain that the party is over, but it won’t force the guests to leave.
I might be wrong about this, but I think the supplement industry has convinced us that more is better because it’s easier to sell a 10mg pill than a 0.3mg one. If you’re going to use it, use the tiny doses. But even then, it’s secondary. It’s a support character, not the lead actor. The lead actor is the sun.
Total waste of money.
Why I refuse to buy Liquid IV (and other ‘hydration’ scams)
I have a specific, probably irrational hatred for those ‘hydration multiplier’ packets. I see people dumping them into plastic water bottles at the gate like they’re preparing for a trek across the Sahara. It’s salt, sugar, and a massive markup. You don’t need a ‘system’ to stay hydrated. You just need to drink water. I refuse to recommend brands like Liquid IV or DripDrop even though everyone seems to love them, mostly because they make people feel like they’ve ‘solved’ jet lag by spending $25 on a pouch of powder. They haven’t. They’re just slightly more hydrated zombies.
One time in the Heathrow terminal, I saw a guy drink three of those things in an hour. He looked like he was vibrating. He still looked like hell when we landed. You can’t buy your way out of a circadian rhythm disruption. It’s an insult to our biology to think a packet of electrolytes can override 200,000 years of evolution. I’ve bought the same $40 Nalgene bottle four times because I keep losing it, but I’ll never buy a ‘travel’ supplement again. I don’t care if something better exists. I’m done with the gimmick.
The part nobody talks about: Light
This section is going to be a bit shorter because it’s simple, but it’s the hardest part to actually do. You need to get sunlight into your eyeballs as soon as you land. Not through a window. Not with sunglasses on. Real, unfiltered photons. I spent 45 minutes sitting on a park bench in London in the drizzling rain once because it was ‘daylight’ and I needed my retinas to see it. I looked like a crazy person. I felt like one, too.
- Land in the morning? Stay outside until noon. No naps.
- Land in the evening? Keep the lights dim and use a blue-light filter.
- If you feel like you’re dying at 2 PM, go for a walk. Do not sit on the bed.
The bed is the enemy. The hotel bed is a siren song designed to ruin your entire week. If you lay down ‘just for twenty minutes,’ you’ve already lost. I’ve done it. I did it in Paris in 2017 and woke up at 11 PM feeling like I had been hit by a truck. Never again.
I still don’t know why we do this to ourselves. Is a week in a new city worth the three days of feeling like a ghost? Maybe. I’m writing this from a cafe in Lisbon, and I haven’t eaten in twelve hours. I feel okay. Or maybe I’m just used to the fog. Ask me next Tuesday.