The science
A travel plan is not medical advice
Your health and medicines can matter when changing sleep, light or caffeine. ChronoFlow's questions do not establish that a plan is medically suitable for you.
Mood and sleep changes
If you have bipolar disorder or have had a manic or hypomanic episode, consult a clinician before changing sleep or light routines for travel. Sleep loss and long journeys may trigger mood episodes.
Eyes and light sensitivity
Eye disease, recent eye surgery or medicines that make your eyes sensitive to light need extra care. If you report an eye disease or such a medicine, ChronoFlow does not suggest a light box or light glasses; that does not establish that other light exposure is suitable for you.
Caffeine and your circumstances
Pregnancy, breastfeeding, some medical conditions and some medicines can change what is appropriate for caffeine. If caffeine is ruled out for you, ChronoFlow can leave caffeine suggestions out; it cannot decide whether a medicine or condition makes caffeine suitable.
Blood-clot risk when flying
If you have risk factors for blood clots, travel-health guidance suggests discussing compression stockings with a clinician before long flights. ChronoFlow's travel guidance is not an assessment of your individual blood-clot risk.
When ChronoFlow cannot offer a plan
ChronoFlow is intended for adults with a regular nightly sleep pattern. It does not offer a plan if you have recently done shift work, or do not usually sleep in one regular nightly episode.
A different sleep pattern
A diagnosed sleep-phase disorder or a very late sleep pattern can make timing estimates less certain. A travel plan does not diagnose or treat a sleep disorder.
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