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“Some of the anxiety and general emotional effects of alcohol withdrawal may be due to poor sleep," said Dr. Nasir H. Naqvi.

It has been known for decades that prolonged wakefulness often quickly relieves depression, writes Dr. David Hellerstein.

“Eating a poor diet, inadequate physical activity and being overweight can also contribute toward disturbed sleep,” Dr. James Gangwisch said.

The brain’s number-one desire is a constant supply of energy. Sugars and sweet foods—even no-calorie sweeteners—trigger insulin, writes Dr. Drew Ramsey.