How Hair Grows — and Why It Stops

Hair forms in follicles — tiny sacs anchored in the dermis.
Each strand grows from a root nourished by blood vessels.
Hair growth follows three phases: growth, rest, and shedding.
The average strand grows about half an inch per month.
Age, hormones, and genetics decide how long each phase lasts.
When follicles shrink or sleep too long, hair thins or stops growing.
Damage, stress, or illness can push follicles into early rest mode.
Hair doesn’t “breathe,” but scalp health fuels its strength.
Proper nutrition revives sluggish follicles over time.
Every hair on your body has its own independent timer.