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Cold Water 'Changes' You - Science Says It Takes Just 1 Week

Published January 3, 2026, 08:14
Cold Water 'Changes' You - Science Says It Takes Just 1 Week

A new study from the University of Ottawa suggests that daily exposure to cold water may have significant health benefits at the cellular level. Researchers found that short dips in cold water (around 14°C) activate cell repair and protection mechanisms, increasing autophagy – the process by which cells clean out and regenerate themselves. Specifically, the study showed a reduction in apoptosis (cell death), lower inflammation, and faster adaptation to stress. The body's initial reaction to the cold is shock, but with repeated exposure, the body adapts and strengthens its cells' resilience. Boosting autophagy is considered crucial for longevity and preventing age-related diseases, such as neurodegenerative, cardiovascular, and metabolic disorders. Regular cold exposure can naturally enhance the immune system through a process called hormesis, turning initial stress into a beneficial stimulus. However, researchers emphasize that the study had limitations, as it only involved ten healthy young men in controlled conditions. Larger studies, including women, are needed to confirm the findings and draw safer conclusions. Consistency and gradual exposure to the cold are key to achieving health benefits.