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Activin helps skin growth and healing mainly through stromal cells and affects keratinocytes based on its amount.

New techniques have improved acne scar treatment, but multiple tailored sessions are often needed.

Various treatments can improve post-acne scars, but results vary.

COVID-19 can cause various skin lesions, which may result from the virus and immune response, and are not directly linked to illness severity.

Hair loss in androgenetic alopecia is caused by genetic factors and androgen excess, and can be treated with combined therapies.

Understanding how baby skin heals without scars could help develop treatments for adults to heal wounds without leaving scars.

The document concludes that various clinical methods are used to assess ageing skin and the effectiveness of anti-ageing products.

Curly hair shape is determined by the hair bulb.

Fat cells are important for healthy skin, hair growth, and healing, and changes in these cells can affect skin conditions and aging.

Menopause reduces skin collagen and elasticity, and while estrogen therapy can help, its risks require careful consideration.

Androgenetic alopecia involves genetics, hormones, and can be treated with medications or surgery.

After menopause, women lose a lot of skin collagen, but estrogen replacement might improve skin health.

Sophora flavescens extract may help hair grow by affecting growth factors and blocking a hair-related enzyme.

Male hormones are important for hair and oil gland development and can cause conditions like excessive hair growth and acne.

The conclusion is that hair growth can be improved by activating hair cycles, changing the surrounding environment, healing wounds to create new hair follicles, and using stem cell technology.

Human hair follicles can regenerate after removal, but with low success rate.

Progress has been made in skin and nerve regeneration, but more research is needed to improve methods and ensure safety.

HFMs can help study hair growth and test potential hair growth drugs.

Vitamin D3 affects cell differentiation in specific skin areas.

Bimatoprost is a safe and effective treatment for making eyelashes longer, thicker, and darker.

Hair growth can be induced by certain cells found at the base of hair follicles, and these cells may also influence hair development and regeneration.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

Androgens can both promote and prevent hair growth due to differences in gene expression in hair follicles.

Skin problems can be caused or worsened by physical forces and pressure on the skin.

Skin fat has important roles in hair growth, skin repair, immune defense, and aging, and could be targeted for skin and hair treatments.

Human hair follicles can make and process prostaglandins, which may affect hair growth.

Skin changes help detect graft-versus-host reaction early after bone marrow transplants.

Platelet-Rich Plasma (PRP) increases the number of new hair follicles and speeds up hair formation.

Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.

The peptide IMT-P8 can effectively deliver proteins into the skin and cells for potential skin treatments.