Why some people never feel the cold: One in five has a mutation that provides ‘superior resilience’ to chilly temperatures, study reveals

Snow

A fifth of the world’s population has a ‘superior resilience’ to colder temperatures thanks to a genetic mutation, allowing them to never feel the cold, study reveals.

Researchers at Karolinska Institutet in Sweden had 32 healthy men aged 18 to 40 sit in 14 degrees Celsius water until their body temperature dropped to 35.5C.

They then measured the muscle electrical activity and took muscle biopsies of the volunteers to study their protein content and fibre composition.

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