Scrolling through your phone before bedtime negatively affects your heart's health by lowering heart rate variability (HRV), ...

Think blue light is hurting your sleep cycle? A new study suggests it can actually improve the overall sleep quality of older adults — but only if they time it right.

Small studies have linked blue light to hyperpigmentation, explains Heather Woolery-Lloyd, M.D., a board-certified dermatologist in Miami, but no one light color has been singled out as worst ...