Sleep-Fx is the only formula you'll need for a full night's rest. Sleep-Fx helps to promote relaxation and relieve nervousness. Sleep-Fx is a natural sleep aid that helps increase the total sleep time and quality of sleep in people suffering from sleep restriction or altered sleep schedule, e.g. shift-work and helps to relive the daytime fatigue associated with jet lag. Sleep FX helps to reduce the time it takes to fall asleep in people with delayed sleep phase disorder and helps to re-set the body's sleep-wake cycle.