March 2026 in “International Journal of Research and Review” This clinical study found that Rosmarinum officinalis mother tincture significantly improved hair volume and density in individuals with diffuse hair loss by enhancing hair parameters measured through a hair shedding visual scale and ponytail thickness test.
This study found that the enzyme encoded by Dgat1 acts as a retinol acyltransferase in murine epidermis, protecting against retinoid toxicity and alopecia by preventing retinol accumulation.
May 2009 in “Hair transplant forum international” This review discusses Dr. Gill Westgate's background in hair growth regulation and industry experience, but reports no new findings or results.
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October 2023 in “Biology” In this study, researchers observed that fasting-induced molting in laying hens led to increased thyroid hormones, which may regulate feather molting by affecting hair follicle growth through specific signaling pathways, highlighting molecular changes during induced molting.
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April 2015 in “British Journal of Dermatology” This article discusses hair shedding in women and does not offer new research results; it highlights the need for objective criteria to define excessive hair shedding.