Researchers at Washington University in St. Louis and Dartmouth College have discovered a connection between toddler hair cortisol levels—a long-term stress biomarker—and maternal prenatal depression.

Cortisol, what is known as the stress hormone, is the talk of the internet. Wellness influencers warn about the various symptoms of chronically high cortisol: waking up at 3 a.m., swollen "cortisol ...

If you've spent any time on social media lately, you've probably seen cortisol blamed for everything from visceral fat to burnout and sleepless nights. While it's true that this stress hormone plays a ...