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The document explains hair and nail biology, common hair loss conditions and treatments, oral and genital skin diseases, and the risks and treatments associated with squamous cell carcinoma.

Hair ages and thins due to factors like inflammation and stress, and treatments like antioxidants and hormones might improve hair health.

Stem cell research and regenerative medicine have made significant advancements in treating various diseases and conditions.

Minoxidil can increase hair density, speed up regrowth in transplanted hair, and slow down further hair loss, especially beneficial for women, young men with thinning hair, and those wanting to reconstruct the back of the scalp.

Proretinal nanoparticles are a safe and effective way to deliver retinal to the skin.

Lasers are FDA-approved for permanent hair reduction, not removal, and more research is needed to improve treatments.

A specific DNA sequence caused hair loss in male mice by activating immune cells and increasing a certain immune signal.

Glycyrrhizic acid and licorice extract can significantly reduce unwanted hair growth.

Proteins like aPKC and PDGF-AA, substances like adenosine and ATP, and adipose-derived stem cells all play important roles in hair growth and health, and could potentially be used to treat hair loss and skin conditions.

Skin and hair renewal is maintained by both fast and slow cycling stem cells, with hair regrowth primarily driven by specific stem cells in the hair follicle bulge. These cells can also help heal wounds and potentially treat hair loss.

IFHUT shows better hair growth than FUE, but needs improvements in positioning, speed, and accuracy.

Minoxidil, finasteride, and hair transplantation combined give best results for hair loss.

Hair loss in mice starts with immune cells damaging hair roots before it becomes visible.

New hair follicles could be created to treat hair loss.

Hair transplant is a safe and effective way to fix aesthetic issues after a facelift, with most patients happy with the results.

Hair loss from alopecia areata and androgenetic alopecia can be treated, but more effective and safer treatments are needed.

hiPSCs can help regenerate hair follicles and treat hair loss.

Platelet-rich plasma can help grow more mouse hair follicles, but it doesn't work for human hair follicles yet.

Overactivating Hedgehog signaling makes hair follicle cells in mice grow hair faster and create more follicles.

The basement membrane matrix helps rebuild hair follicles faster and more effectively.

Human stem cells can help form hair follicles in mice.

Rats can't grow new hair follicles after skin wounds, unlike mice, due to differences in gene expression and response to WNT signaling.

Type 1 Diabetes prevents hair growth by causing cell death in hair follicles.

ILC1-like cells can independently cause alopecia areata by affecting hair follicles.

Three-dimensional culture helps dermal papilla cells grow new human hair follicles.

Adding insulin-like growth factor 1 and bone marrow-derived stem cells to a collagen-chitosan scaffold helps wounds heal faster and regrows hair follicles.

Prolactin slows down hair growth in mice.

The flap assay grows the most natural hair but takes the longest, the chamber assay is hard work but gives dense, normal hair, and the patch assay is quick but creates poorly oriented hair with some issues.

Densely packed hair grafts can survive well using the lateral slit technique.

Injected cells show potential for hair growth.