These bursts cause blood vessels to constrict and then dilate in ... potentially reducing the brain's ability to clear toxins during sleep. "This explains why deep, natural sleep is so restorative ...

The agency OK’d an artificial vessel to restore blood flow in patients, even though its own scientists flagged questionable study results and potentially fatal ruptures of the product.

Even though vaping aerosols don’t have all the same cancer-causing toxins as tobacco smoking, vapers are still breathing chemicals and affecting their blood vessels. E-cigarettes work by turning ...