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Heredity and hormones cause common hair loss, and topical minoxidil is the first recommended treatment.

Hair loss in Androgenetic alopecia (AGA) is due to altered cell sensitivity to hormones, not increased hormone levels. Hair growth periods shorten over time, causing hair to become thinner and shorter. This is linked to miscommunication between cell pathways in hair follicles. There's also a change in gene expression related to blood vessels and cell growth in balding hair follicles. The exact molecular causes of AGA are still unclear.

Animal research has greatly advanced dermatology.

Gender affects hair and scalp characteristics, with differences in hormone responses, graying patterns, and trace metals.

Stem cells show promise for hair loss treatment, but no effective product for hair regeneration has been developed yet.

The document concludes that non-scarring alopecias can be reversed, but scarring alopecias cause permanent hair loss.

Some treatments like topical oxygen and stem cells show promise for wound healing and hair growth, but evidence for modern dressings over traditional ones is limited.

Gradual improvements in hair restoration techniques are safer and more effective than drastic changes.

Scalp flaps are still a valuable hair loss treatment because of their benefits.

Hair loss treated with minoxidil, finasteride, laser/light, hair transplant, and scalp prostheses; more research needed for skin of color.

Insulin resistance and obesity are key factors in the development and worsening of polycystic ovary syndrome, and lifestyle changes are important for managing it.

The Multi-Organ-Chip improves the growth and quality of skin and hair in the lab, potentially replacing animal testing.

Blocking JAK-STAT signaling can lead to hair growth.

Postpartum depression is linked to changes in brain chemicals, inflammation, stress, and certain genes, and can potentially be identified by markers like specific steroids, serotonin levels, and vitamin D levels.

One minoxidil-sensitive potassium channel exists in human hair follicles.

Prolactin affects hair growth and skin conditions, and could be a target for new skin disease treatments.

Blue light promotes hair growth by interacting with specific receptors in hair follicles.

Researchers found 63 genes linked to male-pattern baldness, which could help in understanding its biology and developing new treatments.

Injected human hair follicle cells can create new, small hair follicles in skin cultures.

The skin's ability to produce hormones is linked to various skin conditions, and better understanding this process could lead to new treatments.

The conclusion is that oral contraceptives and antiandrogens can treat hirsutism and acne in women with cutaneous hyperandrogenism, but more research is needed for effective treatments, especially for hair loss.

Bone marrow and umbilical cord stem cells can help grow new hair.

Menopause-related hormonal changes affect hair but are not the only cause of hair changes in middle-aged women.

SVF-enhanced adipose transplantation shows potential as a hair loss treatment.

Diphencyprone treatment increases CD8 lymphocytes in the scalp, which is associated with hair regrowth in alopecia areata patients.

Eyebrow transplantation can be successful for Asians with the right technique and care, but regular maintenance is necessary.

Macrophage-stimulating protein helps hair grow and can start hair growth phase in mice and human hair samples.

Dihydrotestosterone affects hair growth by changing the Wnt/β-catenin pathway, with low levels helping and high levels hindering growth.

HIV-1 may cause increased stem cell death in hair follicles, leading to hair loss.

An apple-based supplement was found to stimulate hair protein production, which may help with hair growth.