Why 60% of Americans struggle with sleep: A neurologist reveals vitamin D deficiency and gut microbiome dysfunction as hidden drivers, not behavioral issues. Dr. Stasha Gominak explains why supplementing without understanding B vitamins creates harm, how indoor living disrupted our biology, and the RightSleep Protocol to restore restorative sleep by rebalancing the microbiome. Vitamin D is a hormone that controls brainstem-regulated sleep architecture; deficiency causes loss of REM and deep sleep, which then cascades into diseases like stroke, diabetes, ADHD, and obesity.