Weekly Digest 20

Energy, Aging, and Reversal of Hair Greying

WEEKLY DIGEST

This week on The Science and Experience of Energy, we explored what grey hair can reveal about stress, aging, and the possibility of biological reversal, and what metabolism can teach us about energy sustainability.

The first piece allows us to (re-)visit a familiar sign of aging: grey hair. Like everything else in biology, growing shiny colored hairs costs energy. Research from the Mitochondrial Psychobiology Group showed that some hairs can lose pigment and later regain it. Hair greying is not always a one-way process.

The second piece asks whether our mitochondria can teach us something about how to meet our energy needs in a changing world. Drawing on the fundamentals of metabolism—oxygen use, carbon dioxide production—we ask what a more sustainable energetic system might look like, in the body and in the world.

Together, these pieces point to a powerful idea: our bodies and social collectives are constantly adjusting to energy demand, stress, rest, and recovery.

Thank you for being part of this growing, interconnected community.

With gratitude,
Martin

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