Clocks fall back Sunday, Nov 1. Get your sleep ready, with up to 2x more deep and REM sleep in a clinical study.
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The clock moves an hour. Your body takes a while to follow, and darker mornings and evenings make it harder. A steady routine helps.
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5-Night Trial
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Getting the most from it: take it five nights in a row if you can. If you use a wearable, compare your deep and REM sleep before and after.
Defined Sleep has no sedatives and won't knock you out. It was developed by Paul Muchowski, Ph.D., a neuroscientist and former UCSF professor, and tested in an FDA-registered, double-blind, placebo-controlled, randomized crossover trial, with sleep stages measured every night by a validated wearable (actigraphy). Participants with the lowest starting levels got up to 2x more deep and REM sleep.
Read the study in the Journal of Clinical Sleep Medicine
See the clinical trial summary
FALLBACK10 takes $9 off the 5-Night Trial, once per customer, for customers who have not had a trial before. Ends December 10, 2026. It cannot be combined with other offers and does not apply to subscriptions, which are already $55 per delivery. Free or discounted trial purchases are ineligible for the money-back guarantee.