Why eyebrows thin after 40 (and what actually helps)

It usually starts at the tail

Most women notice it in photos first. The outer third of the brow looks shorter, then the body of the brow loses density. It is one of the most common things Nicolina hears in the salon, and it is rarely about plucking alone.

What changes

Hair spends less time in its growing phase as hormone levels shift, so each hair is finer and shorter lived. Thyroid changes can cause a similar pattern. If thinning is sudden, or comes with other symptoms, speak to your GP first.

What actually helps

Be gentle: stop tweezing the tail, swap waterproof brow products for ones that wash off easily, and condition the hairs you have. A peptide serum used nightly, with the dermaroller up to three times a week, supports the hairs at the root. Give any routine a full twelve weeks before you judge it.