What it is for
- Faster sleep onset / shorter sleep-onset latency (SOL) in primary / chronic insomnia.
- Better sleep quality (subjective scales; Circadin “quality of sleep + morning alertness” composite).
- Longer total sleep time (TST) and higher sleep efficiency.
- Better sleep in adults ≥55 with age-related insomnia (the Circadin-labelled population).
- Less subjective jet-lag after crossing several time zones, especially eastward.
- Faster sleep at destination bedtime; less daytime fatigue after the flight.
- Advance of DLMO and clock-hour of sleep onset in DSWPD.
- Entrainment in sighted or blind non-24-hour sleep-wake disorder.
- Longer daytime sleep after a night shift (shift-work disorder).
- Lower oxidative stress / better mitochondrial function in otherwise well adults.