Articles on circadian rhythm

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Is a bottle of morning milk at night the equivalent of turning on all the lights at bedtime? comzeal images/Shutterstock.com

Human breast milk may help babies tell time via circadian signals from mom

Breast milk contains ingredients in concentrations that change over the course of the day. Researchers think milk is chrononutrition, carrying molecular messages to help set a baby's internal clock.
Changing to daylight saving time can impact our mood, our risk of heart attack and how much exercise we get. Gregory Pappas

How the switchover to daylight saving time affects our health

Daylight saving time begins this weekend, which means many of us will get an hour less sleep. But the health effects go beyond sleep – and can last two weeks or more. Here's what the research says.
A New York engineer is wheeled away in December 2013, after a train he was driving crashed. Lack of sleep could have been a factor. AP Photo/Robert Stolarik

The dark side of daylight saving time

Most Americans dread the time switch to daylight saving time, which results in a loss of an hour's sleep. The downside is more serious than that – it can lead to workplace injuries and traffic fatalities.

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