06/29/2026
I came across an article discussing hydration, oxidative stress, and frequent flying, and it got me down a rabbit hole.
As flight attendants we accept feeling dry, tired, and foggy as “part of the job,” but our bodies are dealing with a pretty unique environment every time we fly.
Let’s break down some of the science.
Commercial aircraft expose us to low humidity, mild hypoxia (lower oxygen pressure), circadian disruption, and long periods of sitting.
Researchers know these conditions increase oxidative stress in the body. What they’re still studying is the best way to support ourselves through it.
One fact that surprised me was cabin humidity
Most aircraft cabins sit between 10–20% humidity, which is comparable to desert conditions. On longer flights you can lose a significant amount of water simply through breathing and your skin.
Hydration isn’t just about thirst.
One thing I appreciated about the article was that it didn’t overpromise.
Hydrogen water doesn’t hydrate you better than regular water.
Water is still water.
The research is looking at something different: whether dissolved molecular hydrogen may help support the body’s response to oxidative stress and inflammation.
Here’s where it’s important to separate facts from assumptions.
There are human studies showing effects on oxidative stress and inflammation markers.
There are not studies showing hydrogen water cures jet lag or has been specifically tested in flight attendants.
That’s an important distinction, and one worth being honest about.
Whether you choose hydrogen water or not, the basics still matter.
✔ Drink enough water.
✔ Prioritize sleep whenever possible.
✔ Move your body during long sits.
✔ Support your health consistently—not just when you feel run down.
Small habits compound.
This carousel was inspired by an article from PurePebrix reviewing the current evidence around hydrogen water and frequent flying. If you’re someone who likes reading the source material yourself, it’s worth checking out. I always encourage people to read beyond headlines and make up their own minds.
