Medically reviewed by Brian H. Wetchler, DO Key Takeaways Adrenal glands produce hormones that affect heart rate, blood pressure, and stress response.High cortisol levels can cause weight gain, ...

The thyroid is a butterfly-shaped gland that sits in the front of the neck. It produces hormones that are essential for heart rate, digestion, mood, and other functions crucial to human health.

A hidden cellular cleanup system may hold the key to healthier tear glands—and new hope for treating dry eye disease.