Aging and cold sensitivity: physiological causes and risks

As temperatures drop, older adults often experience increased sensitivity to cold due to physiological changes in how the body produces and retains heat. Medical experts, including Dr. Elise Dallas of London General Practice, note that several factors contribute to this phenomenon.

Key biological drivers include a slowing metabolism, loss of muscle mass (sarcopenia), and reduced subcutaneous fat, which acts as natural insulation. Additionally, aging can lead to less efficient blood circulation, thinner skin, and a diminished response from the hypothalamus, the brain's temperature control center. Changes in thyroid function and reduced brown fat activity also play roles in lowering heat production.

While often benign, extreme cold sensitivity can increase the risk of hypothermia, defined by the Ameli health insurance site as a core body temperature falling below 35°C. Understanding these mechanisms allows for better management of diet, activity, and environment to maintain warmth during winter.