Hair thinning can be distressing—and often, it feels like it happens out of nowhere. But the truth is, most thinning happens gradually, beneath the surface, long before it becomes visible.

For hair to grow strong and healthy, the scalp and hair follicles must be in optimal condition. When that delicate balance is disrupted, the growth cycle slows, weakens, or stops altogether.

Here’s what can cause thinning hair:

• Progressive, age-related factors:
  Genetics, hormonal shifts, and the natural aging process can slowly shorten the hair growth cycle and shrink hair follicles, leading to finer, less dense hair over time.

• Sudden, stress-related triggers:
  Illness, emotional stress, childbirth, or drastic lifestyle changes can push hair prematurely into the shedding phase (telogen effluvium), resulting in rapid and noticeable thinning.

• Scalp health issues:
  Buildup from oil, products, and environmental pollutants can clog follicles and suffocate hair growth. Inflammation, irritation, and poor circulation also impair the scalp's ability to support healthy strands.

At Cosh, we believe treating thinning hair starts with treating the scalp. That’s why our targeted programs are designed to create the right conditions for hair to thrive again—by supporting scalp health, rebalancing the growth cycle, and nourishing the follicles where healthy hair begins.