Cortisol is a steroid hormone that regulates a wide range of body functions, including immunity, inflammation, and metabolism. Because of its role in regulating the stress response, people also call ...

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Vitiligo is an autoimmune disease that develops when your immune system mistakenly attacks pigment-producing cells in your skin called melanocytes, causing skin depigmentation and color loss.

Emily Kirkpatrick is a former associate style news editor at PEOPLE. She left PEOPLE in 2017. Vesnaandjic / Getty Images Vitiligo is a chronic disorder, often due to genetics or a change in the immune ...

Vitiligo is diagnosed with a physical exam, blood test, and biopsy. A Wood's lamp exam helps distinguish vitiligo from other skin conditions. You can also regularly check your skin, hair, and eyes for ...

Cortisol is a hormone that naturally occurs in your body, but can cortisol supplements really reduce stress? We asked experts to find out. Joshua Cox-Steib is a sociologist and freelance writer. He ...