I started intermittent fasting and my sleep improved remarkably when I stopped eating calories after 3PM. Last night it shows I was awake for 16 minutes but in

I started intermittent fasting and my sleep improved remarkably when I stopped eating calories after 3PM. Last night it shows I was awake for 16 minutes but in the morning my dream memories seem to be vast. My mother got Alzheimer's in her early 60s and was always a super light sleeper despite a healthy and happy lifestyle. I suspect her brain's glymphatic system wasn't kicking in often enough to clean her brain.