Jet lag is a temporary sleep disorder that occurs when you travel quickly across multiple time zones. It happens because your body’s internal clock, also known as the circadian rhythm, struggles to adjust to the new local time. This disruption can leave you feeling tired, disoriented, and generally unwell, even though your trip might have just begun.
People experience jet lag differently, but common symptoms include fatigue, difficulty sleeping at night, waking up too early, poor concentration, irritability, and digestive issues such as indigestion or loss of appetite. The severity of symptoms often depends on how many time zones you’ve crossed and the direction of travel, with eastward travel usually causing stronger effects.
The primary cause of jet lag is the mismatch between your body’s natural circadian rhythm and the new time zone. For example, if you arrive in another country where it’s daytime, your body may still believe it’s night, leading to tiredness during the day and restlessness at night. Other contributing factors include long flight times, dehydration, lack of movement on the plane, and changes in meal patterns.
Anyone can suffer from jet lag, but some people are more susceptible than others. Frequent travellers, such as business professionals or cabin crew, often experience ongoing symptoms. Older adults may also find it harder to recover, while children and younger people tend to adjust more quickly. Pre-existing sleep problems or poor overall health can make jet lag worse.
There are several ways to reduce the impact of jet lag. Adjusting your sleep schedule a few days before travel, staying well-hydrated, and getting natural sunlight on arrival can all help reset your body clock. Avoiding caffeine and alcohol during flights may also reduce symptoms. Some people find short naps useful, while others benefit from sleep aids or melatonin supplements under medical advice.
Recovery time varies depending on the number of time zones crossed. As a general rule, it takes about one day per time zone to fully adjust, though some people adapt faster. Listening to your body, eating balanced meals at local times, and maintaining a steady sleep routine are all important in easing the transition. With careful planning, the unpleasant effects of jet lag can be managed, allowing you to enjoy your trip more fully.
Browse our FAQs on this condition below. Need more help? Get in touch via WhatsApp, call or email.
Jet lag tablets, such as melatonin tablets UK, help regulate the body’s sleep cycle when adjusting to different time zones. They support the natural sleep-wake pattern, making it easier to fall asleep and wake up at the right times.
Jet lag typically lasts a few days, but it can take up to a week to fully adjust depending on how many time zones you’ve crossed.
Melatonin supplements like Circadin are considered effective in helping the body adjust to new time zones and improving sleep quality.
It’s usually taken 1–2 hours before your intended bedtime in the new time zone. Your prescriber will advise the best timing for your journey.
Yes, melatonin treatments like Circadin can be ordered online following a quick online consultation with a licensed UK prescriber.