Breast cancer spreads more aggressively during sleep - National Geographic

Many more cancerous cells circulate in the blood at night, suggesting that time of day could play a role in diagnosis and treatment.

More than just a 24-hour biological timer that lulls us asleep at night and awakens in the morning, the inbuilt master clock in the human brain also controls the daily ebb and flow of hormones, regul… [+977 chars]

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