What sleep inertia really is
Sleep inertia is the lag between waking up and your prefrontal cortex coming back online. A short inertia (5-10 minutes) is normal. A long one (45+ minutes of fog, irritability, slow reaction time) means you're being yanked out of the wrong sleep stage.
Why melatonin and antihistamines make it worse
Both sedate you into bed but suppress REM and deep sleep. Your body compensates with longer, shallower cycles, and you wake up mid-cycle, drugged. That's the 'hangover' so many people get from sleep gummies and ZzzQuil.
How Sleeptruly helps
No melatonin. No antihistamines. No sedatives. The stack supports your body's own sleep architecture so you wake from the end of a real cycle, not the middle of a chemical one. Most people notice clearer mornings within the first week.