Sources & Editorial Updates

Key evidence sources for the launch edition include the 2026 systematic review “Slow breathing techniques before bedtime and the effects on sleep” (Sleep Medicine Reviews; PMID 41886931), the American Academy of Sleep Medicine clinical practice guidance on behavioral and psychological treatment of chronic insomnia, and the current Breathing for Sleep merchant page for product-specific offer details. Product price, bundle contents and guarantees are treated as time-sensitive merchant terms.