The CDC (Centers for Disease Control and Prevention) features the Timeshifter jet lag app in its Yellow Book 2026 – a trusted resource for healthcare professionals providing care to international travelers.

This is a major step toward replacing jet lag myths and self-proclaimed “jet lag solutions” that fail to address the underlying problem – circadian misalignment – with real circadian science.

Jet lag CANNOT be fixed with generic sleep advice, exercise, hydration, dietary supplements, special diets, or fasting. None of these approaches will quickly adjust a traveler’s circadian clock quickly to new time zones.
Light is the key time cue to “reset” our circadian clock, so the correct timing of light exposure and avoidance, based on the traveler’s chronotype, normal sleep pattern and itinerary, is the only way to adjust to new time zones quickly. If the traveler’s timing is wrong, it will make their jet lag worse.

This is a big win for the field of circadian science and for travelers everywhere who deserve accurate, effective guidance to arrive at their best — no confusion, no gimmicks, just results.

Learn more about jet lag science here.