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Scientists have improved 3D models of human skin for research and medical uses, but still face challenges in perfectly replicating real skin.

3D bioprinting is advancing in plastic and reconstructive surgery, especially for creating tissues and improving surgical planning, but faces challenges like vascularization and material development.

Plant-based compounds can improve wound dressings and skin medication delivery.

The 2015 Hair Research Congress concluded that stem cells, maraviroc, and simvastatin could potentially treat Alopecia Areata, topical minoxidil, finasteride, and steroids could treat Frontal Fibrosing Alopecia, and PTGDR2 antagonists could also treat alopecia. They also found that low-level light therapy could help with hair loss, a robotic device could assist in hair extraction, and nutrition could aid hair growth. They suggested that Alopecia Areata is an inflammatory disorder, not a single disease, indicating a need for personalized treatments.

Caffeine, niacinamide, and panthenol may improve hair growth, fullness, and healing when applied to the scalp.

Advancements in tissue engineering show promise for hair follicle regeneration to treat hair loss.

TRPA1 is crucial for mechanical sensitivity in skin sensory neurons.

Minoxidil may cause heart issues in guinea pigs, suggesting potential harm for users with heart conditions.

Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.

New imaging and testing methods can effectively assess hair shape changes and damage.

Microneedles are effective for painless drug delivery and promoting wound healing and tissue regeneration.

A single robotic system can accurately harvest and implant hair grafts, showing promise for real-world use.

Understanding the properties of hyaluronic acid helps improve its use in facial aging treatments.

Manatee whiskers are specially adapted for touch in water.

The Cell Membrane Complex in hair has both water-attracting and water-repelling layers.

Oxidative hair dye changes hair color and structure but doesn't weaken it.

Hair fibers interact through classical forces, which are influenced by treatments and products, important for hair care and other applications.

Some plant-based ingredients may help with hair growth and care, but more research is needed to confirm their effectiveness.

Chemical treatments and daily stresses damage hair, especially the cuticle layer.

Dermatologists need to understand hair products to treat hair and scalp issues better.

Fat cells are important for tissue repair and stem cell support in various body parts.

Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.

A new liposome treatment helps heal deep burns on mice by improving hair regrowth and reducing scarring.

Obesity is linked to various skin conditions and issues, and losing weight can improve these conditions.

Maritime pine bark has various chemical components useful for different industrial uses.

The review concludes that innovations in regenerative medicine, tissue engineering, and developmental biology are essential for effective tissue repair and organ transplants.

Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.

Human hair's ability to get wet is complex and can change with treatments, damage, and environment.

Water and fatty acids affect hair's surface differently based on hair damage, and models can help understand hair-cosmetic interactions.