Robuta

https://www.news-medical.net/health/Hyperkeratosis-Thickening-of-Keratin-in-Epidermis.aspx Hyperkeratosis - Thickening of Keratin in Epidermis Hyperkeratosis is the term to describe thickening of keratin in the epidermis, which is the outer layer of the skin. Keratin is a protein found in the outer... hyperkeratosisthickeningkeratinepidermis