You may sleep for 8 hours, but frequent disturbances and light sleep reduce recovery.
Low Vitamin D, B12 or iron levels can make you feel exhausted throughout the day.
Underactive thyroid slows down metabolism, leading to fatigue even with proper rest.
Mental stress keeps your body in a “tired-but-alert” state, preventing deep rest.
Being inactive actually makes you feel more tired, not more rested.
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