Does Human Milk Composition Make the Infant Body Clock Tick?

Human beings have internal clocks. Locked in a room with no source of daylight nor regularly scheduled stimulation, our bodies cycle automatically through periods of slightly longer than 24 hours, sleeping and waking more or less as if the sun were rising and falling over a horizon that we could see. But we are not born this way. Instead, infants develop body clocks gradually. Researchers investigating this aspect of development have recently wondered how much human milk contributes to the process, in the knowledge that its levels of nutrients and hormones vary over the course of the day. Read More...