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The document explains how shampoos clean, rinses condition, one-step shampoos offer convenience, and hair growth promoters aim to prevent hair loss, emphasizing the importance of scientific evidence for their effectiveness.

Hair and nails are skin parts that develop early and serve protective and functional roles.

Various medicinal plants like Polygonum multiflorum, Red ginseng extract, and Zizyphus jujuba can potentially treat hair loss, offering benefits like low cost and multiple ways of working. Other effective natural substances include Pygeum africanum, Seneroa, Urtica dioica, and more.

Integrin alphavbeta6 is important for wound healing and hair growth, and blocking it may improve these processes.

CRISPR/Cas9 has improved precision and control but still faces clinical challenges.

Using laccase to add poly(tyrosine) to wool makes it less likely to shrink and stronger.

Calcium and magnesium in hair increase with age and are higher in adult women.

TGase 3 helps build hair structure by forming strong bonds between proteins.

Small proline-rich proteins and trichohyalin help make epithelial tissues tougher and more flexible.

AFM helped show how hair changes under tension and the effects of damage and conditioner.

Hair lipids do not protect against humidity.

Heating hair proteins changes their structure and may improve their blood clotting ability.

A new film made from human hair supports skin cell growth better than collagen.

Scientists created a non-toxic, sugar-based hair product that can style hair without damage.

Keratin from hair and wool is used in medical materials for healing and drug delivery.

Large-scale fibronectin nanofibers help heal wounds and repair tissue in a skin model of a mouse.

Keratin films from human hair can potentially replace human nail plates for drug testing.

A mouse gene mutation increases the risk of skin cancer.

Perming and bleaching damage hair differently, with bleached hair having more cysteic acid in the cuticle.

WWOX deficiency in mice causes skin and fat tissue problems due to disrupted cell survival signals.

Botulinum toxin is effective for various skin conditions, but more research and awareness of side effects are needed.

Certain changes in the VEGF gene can increase or decrease the risk of polycystic ovary syndrome.

PepACS offers a safer, eco-friendly way to perm, dye, and repair hair.

Human hair keratins K85 and K35 create unique filament patterns important for early hair formation.

Too much selenium can cause hair loss and nail problems.

AP collagen peptides improve hair elasticity and gloss.

Atomic Force Microscopy is a more accurate way to assess hair damage and the effect of cosmetic treatments.

Juglone from walnut extracts may help repair damaged hair.

Botulinum Neurotoxin-A can treat acne, oily skin, rosacea, hair loss, prevent scars, relieve nerve pain, reduce excessive sweating, and manage psoriasis, but more trials are needed to confirm its effectiveness.