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Chitin and chitosan are useful in cosmetics for oral care, haircare, and skincare, including UV protection and strength improvement.

The skin is a complex barrier for drug penetration, but understanding its structure and interactions can improve drug delivery methods.

Scientists have found a way to create hair follicles from skin cells of newborn mice, which can grow and cycle naturally when injected into adult mouse skin.

Lactate production is important for activating hair growth stem cells.

A new microneedle patch made from hair proteins helps regrow hair faster and better than current treatments.

Caffeine in cosmetics may reduce cellulite, protect skin, and stimulate hair growth, but more research is needed on its use and effects.

Male and female skin differ due to hormones, affecting conditions like hair loss, acne, and skin cancer, and suggesting a need for gender-specific treatments.

Nanoparticles improve drug delivery through the skin but more research is needed on their long-term effects and skin penetration challenges.

Bioprinting could improve wound healing but needs more development to match real skin.

Scalp dermoscopy is good for diagnosing a type of hair loss and helps choose the best spots for biopsy.

The dermal papilla is crucial for hair growth and health, and understanding it could lead to new hair loss treatments.

Cathepsin L is essential for normal hair growth and development.

Hair follicles may soon be used more for targeted and systemic drug delivery.

Fat-derived stem cells show promise for skin repair and reducing aging signs but need more research for consistent results.

The document concludes that specific cells are essential for hair growth and more research is needed to understand how to maintain their hair-inducing properties.

The conclusion is that FFA and LPP have similar scalp biopsy features, making them hard to distinguish histologically, and FFA may be a specific kind of scarring hair loss.

The telogen phase of hair growth is active and important for preparing hair follicles for regeneration, not just a resting stage.

Liposomes could improve how skin care products work but are costly and not very stable.

The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.

Mutant CDP/Cux protein causes hair defects and reduced male fertility in mice.

Peripilar signs can help diagnose androgenetic alopecia and reveal its cause.

Iranian veterans exposed to sulfur mustard suffer from long-term skin itching and eye damage, with some risk of skin cancer and ongoing management challenges.

Skin fat helps with body temperature control and has other active roles in health.

All-trans retinoic acid causes hair loss by increasing TGF-β2 in hair follicle cells.

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

EVAL membranes help create cell structures that can regrow hair follicles.

Larger spheroids improve hair growth, but size doesn't guarantee thicker hair.

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

Environmental factors, hormones, nutrition, and stress all significantly affect skin health and aging.

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