A report from the Wall Street Journal indicates that drinking cow’s milk produced at night may be a treatment for insomnia and anxiety.

A glass of milk at bedtime has long been touted as a sleep aid. But the study found that milk collected at night, or night milk, had enhanced sedative effects in mice compared with milk produced during the day. Night milk significantly decreased the rodents’ physical activity, balance and coordination and increased sleep time compared with day milk, the research showed.

Mice fed night milk were more inclined to explore open spaces, an indication of reduced anxiety that was comparable to the effects from consuming diazepam, a drug commonly used to treat anxiety in people, the researchers said.

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