But this is at day 0. before treatment.
“Immunohistomorphometry showed that WAY-316606 treatment rapidly and significantly up-regulated protein expression of the hair shaft keratin K85 (
Fig 3B), which is expressed within the pre-cortical hair matrix and the hair shaft [
30]. Therefore, antagonising SFRP1 activity enhances human hair shaft production, and do so more effectively than CsA.”
“Indeed, after 6 days of treatment with WAY-316606, a greater percentage of organ-cultured anagen scalp HFs had remained in anagen VI, both macroscopically (
Fig 3C and
S11 Fig) and microscopically, as validated by standardised, quantitative hair cycle histomorphometry [
15] (
Fig 3D–3H). This corresponded to a significantly higher percentage of proliferating (Ki-67+) hair matrix keratinocytes (
Fig 3D and 3E), a greater number of DAPI+ cells below Auber’s line (
Fig 3D and 3F), and a significantly higher melanin content of WAY-316606–treated HFs”
So the keratin and melanin content is an important marker of hair thickness, but yeah you’re right about whether or not those hairs were thickened by WAY or were already like that.
https://journals.plos.org/plosbiology/article/figure?id=10.1371/journal.pbio.2003705.g003