At any time, about 90% of the hair on a person’s scalp is growing. Each follicle has its own life cycle that can be influenced by age, disease, and a wide variety of factors. This life cycle is ...

The stem cells found in hair follicles promise to reactivate hair growth and revolutionize future medical treatments for ...

Though commonly called a “hair follicle test,” this drug test only tests clipped strands of hair, not the follicle located under the scalp. During this test, a small amount of hair is removed ...

Researchers explain how prolonged stress and malnutrition affect hair’s life cycle and accelerate scalp ... stress damages ...

Hair loss is more than a cosmetic concern—it can quietly erode self-image, confidence, and daily quality of life. If you're experiencing thinning or hair loss, you are far from alone—and more ...

Hair growth is regulated by circadian genes expressed in your hair follicles. Sleep deprivation disrupts this cycle, reduces protein synthesis, and increases stress — all of which can affect ...