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 ...

The DHT in turn causes follicles to sprout shorter and finer hairs before eventually dying out. It also causes the growth phases of hair follicles to become shorter, and the rest phases to be longer.

that extra hair synchronously shifts [hair follicles] into the shedding phase, causing noticeable hair fall a few months later,” notes Dr. Bauman. “If a woman is prone to hereditary hair loss ...

Pili multigemini, also known as compound hairs, is when a hair seems to have Siamese-twinned itself, and now two hairs (or even several more) grow from one single follicle. “The exact cause is ...

Hair serves an important cosmetic function for humans, and the hair follicle produces sweat gland products that help to control body temperature and release pheromones 3. Billions of people ...

It is one of many types of folliculitis, an infection in your hair follicle. It's caused by an overgrowth of a yeast called Malassezia that most people have naturally on their skin. But ...

that extra hair synchronously shifts [hair follicles] into the shedding phase, causing noticeable hair fall a few months later," notes Dr. Bauman. "If a woman is prone to hereditary hair loss ...