Undiagnosed sleep apnea
Loud snoring plus daytime sleepiness warrants a home sleep test.
Iron, vitamin D or B12 deficiency
Three of the most common deficiencies behind chronic fatigue. A simple blood panel can identify them.
Poor sleep efficiency
Spending 9 hours in bed but only 6.5 asleep means your real sleep is well below the 7-hour minimum.
Hidden dehydration
Even mild dehydration reduces alertness and increases perceived effort during the day.
Mental load and burnout
Sustained chronic stress depletes the same energy systems that sleep is meant to restore.