Does Jet Lag Age You? The Truth Behind Long-Haul Flights and Biological Age (2026)

The idea that a single overseas flight could age you 13 years is a captivating concept, but it's a bit of a stretch, isn't it? Bryan Johnson, a longevity influencer, has sparked a debate with his claim that his recent trip to Australia aged him biologically by 13 years due to jet lag. While it's true that jet lag can take a toll on the body, the notion of it aging you significantly is a bit of an exaggeration, isn't it? Let's dive into this and explore the science behind it, along with some personal insights.

The Science of Jet Lag

Jet lag is no joke, and it's not just about feeling groggy. Sean Cain, a professor at Flinders University, explains that jet lag can disrupt our circadian rhythm, which is like the body's internal clock. When we travel across time zones, our body's natural rhythm gets thrown off, leading to a range of issues. But does it really age us? Well, that's a bit of a stretch.

Grip Strength and Jet Lag

One of the key areas of interest for Johnson was his grip strength, which is a good indicator of overall health. It's true that jet lag can impact our physical performance, but it's not a permanent change. Associate Professor Nicola Massy-Westropp explains that while grip strength might be lower after a long-haul flight, it's usually a temporary dip. Our bodies adapt, and we're back to normal once we're rested and acclimatized.

Recovery and Adaptation

The good news is that our bodies are remarkably resilient. Sean Cain, who has developed an app to help with jet lag recovery, emphasizes that the dip in physical performance after a long-haul flight is fully recoverable. It's all about rehydrating, getting moving, eating well, and prioritizing sleep. Once we've done that, our physical performance should return to normal.

Personal Perspective

Personally, I think Bryan Johnson's claim is a bit of an overstatement. While jet lag can be uncomfortable and impact our physical performance, it's not a significant enough change to age us by 13 years. Our bodies are incredibly adaptable, and with a bit of care and attention, we can bounce back from the effects of long-haul travel. So, the next time you're planning an overseas trip, don't worry too much about aging - just focus on enjoying the journey and taking care of yourself along the way.

Does Jet Lag Age You? The Truth Behind Long-Haul Flights and Biological Age (2026)

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