To assess the conditioning properties of products, permed hair is treated in a standardized manner with products. Subsequently, each of the hair tresses is examined using induced chemiluminescence (ICL-H). Permed hair gives a stronger signal than untreated hair. Conditioning properties (i.e. moisturizing properties) reduce the signal measured.
Roger Guillemin identified the molecules in the brain that control the production of hormones in…
In 2007, Sinclair wrote the article “Healthy Hair: What is it?” in which he stated,…
We spoke to John Chave, director-general at trade body Cosmetics Europe, about changing regulations, what’s…