‘EATING JET LAG’ IS A REAL THING – THIS IS THE TOLL DIFFERING MEAL TIMES CAN HAVE ON YOUR BODY

We all have our little routines for the working week, whether that’s stopping at the same coffee shop on the way into work for a matcha every morning or taking your break at the same time every day to fit in a spot of lunchtime pilates. These routines often have a knock-on effect that means our meal times from Monday to Friday tend to be fairly rigid. But what happens at the weekend?

Once the daily grind of work isn’t there to structure our day around, meal times often become more flexible. You might have a lie-in on a Saturday morning, for example, or book in a late, leisurely brunch with friends. Perhaps it’s time to catch up with your mum for afternoon tea or cook a roast for Sunday lunch. Suddenly, your usual three square meals a day are out the window, and meal times – and the frequency thereof – look nothing like your usual daily pattern.

You might think that’s perfectly harmless. We all deserve to relax and shake things up a little on the weekend, after all. However, fluctuating your meal times throughout the week can have a bigger effect on your body than you might realise, causing something known as ‘eating jet lag’.

What is ‘eating jet lag’? 

“Eating jet lag refers to irregular meal timing, such as when your eating schedule shifts significantly between weekdays and weekends,” says Lola Biggs, dietitian at Together Health. “For example, you might eat breakfast at 7am and dinner at 6.30pm during the working week, but sleep in at the weekend, and eat brunch at 11am and dinner closer to 9pm. These shifts may feel harmless, but they can confuse your body’s internal systems.”

Our bodies, Biggs explains, run on circadian rhythms, but this doesn’t just affect our sleep; it also affects our metabolism, digestion and hormone regulation. “When we eat at inconsistent times, especially if we delay meals too often, it can disrupt these natural rhythms,” she explains.

Dr Ritz Birah, sleep expert for PandaLondon, says that our bodies have multiple internal clocks. “Not only in the brain but also in peripheral organs, such as the liver, pancreas and gut. They regulate digestion, metabolism and hormone release, and when we eat at irregular times, these clocks can fall out of sync with one another, leading to metabolic confusion and physiological stress.”

What effect does ‘eating jet lag’ have on the body? 

Dr Suzanne Wylie, a GP and medical adviser for IQdoctor, says that many patients report feeling “sluggish, bloated or experiencing disrupted sleep patterns after weekends of irregular eating”.

This is because our bodies are finely tuned to anticipate regular patterns of food intake, which is why inconsistent meal times can wreak havoc on our bodies. “Consistent mealtimes help to anchor the circadian rhythm, signalling to the body when to expect activity and when to prepare for rest,” says Dr Birah. “When meal timing shifts later at weekends, for example, it can delay the body’s internal clock, making it harder to fall asleep or wake up at regular times once the working week resumes, a phenomenon sometimes referred to as social jet lag.”

But irregular eating can also affect digestion and energy regulation. “Eating late at night or varying meal times can impair glucose metabolism, increase gastrointestinal discomfort and reduce the quality of sleep by elevating core body temperature or triggering indigestion close to bedtime,” says Dr Birah. “Over time, such inconsistency may contribute to weight gain, fatigue and reduced cognitive performance.”

How can you avoid ‘eating jet lag’?

The experts agree that aiming for consistent meal timings each day is key to avoiding eating jet lag, but the first and last meals of the day are particularly, says Biggs. “I always recommend trying to eat breakfast within an hour of waking and keeping your last meal at least three hours before bed. Of course, life doesn’t always allow for perfect timing – with travel, social plans or shift work – but even maintaining some regularity around these two anchor meals can help support your body’s natural rhythm.”

Biggs doesn’t recommend absolute rigidity, but suggests that planning your weekends in advance could help you to avoid drastic shifts in your eating windows. “Brunch no later than 10am and dinner before 8pm, for example, can help reduce that weekday-weekend gap that causes eating jet lag,” she says. Additionally, she adds that a high-quality multivitamin can help to support overall health when eating jet lag is inevitable.

Images: Getty

2025-11-11T09:18:09Z