Add Yahoo as a preferred source to see more of our stories on Google. A strand of hair contains three layers: the cuticle, cortex, and medulla. The design of the cuticle layer, in particular, is ...

New research shows that cortisol and cortisone levels in the hair of people living with HIV were negatively associated with CD4 count, but not with HIV viral load. Among Chinese patients living with ...

In a study involving 11-year-olds, researchers have concluded that greater behavioral problems are linked to higher hair cortisol levels. The study also concluded that exposure to certain factors that ...

The prospect of a non-invasive test of ovarian reserve is a little closer following results from a study showing that measurement of a fertility hormone can be accurately taken from a sample of human ...