Different types of sun exposure can damage skin cells and affect healing, with chronic exposure being more harmful, and certain immune cells help in the repair process.
April 2018 in “Journal of Investigative Dermatology” Activating Nrf2 helps wounds heal faster by increasing hair follicle stem cells.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” Developing hair follicles form from ring-shaped patterns, with future stem cells originating from the outer ring, not the upper layers, as previously thought.
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June 2016 in “Cell Transplantation” Sebaceous glands can help harvest hair follicle stem cells to regenerate skin and hair.
February 2023 in “Mağallaẗ Tikrīt li-l-ʻulūm al-ṣirfaẗ/Tikrit journal of pure science” Horse skin has a layered epidermis, a dermis with hair follicles, sweat and sebaceous glands, and is supplied by small arteries.