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Hair's structure and properties change with pH; acidic pH maintains strength and less swelling, while alkaline pH increases water content and swelling.

Ganxi goats' skin and hair adapt to heat and humidity, possibly aided by GSDMA protein.

Argan, avocado, and coconut oils are absorbed into hair, improving hydration and protection.

Neonate scalp hair is thinner, lacks a medulla, and has smaller follicles compared to adult hair.

Ziehl-Neelsen's stain helps identify different parts of hair in sheep and goats.

Hair greying is linked to reduced ATM protein in hair cells, which protects against stress and damage.

Protein carbonylation is a sensitive marker for oxidative damage in hair, especially from light exposure.

Skin needs dermal β-catenin activity for hair growth and skin cell multiplication.

Wnt signaling controls whether hair follicle stem cells stay inactive or regenerate hair.

Human skin produces sex hormones like estrogen and testosterone, influenced by ARO and StAR, which may affect skin elasticity and hair growth.

New cells are added to the hair's dermal papilla during the active growth phase.

Giving high-quality protein or methionine supplements helps improve hair growth in Angora goats and, to a lesser extent, in Cashmere goats.

Hormones, nutrition, and seasonal changes regulate hair growth cycles, with androgens extending growth phases and factors like aging and malnutrition affecting hair loss and thinning.

A gene in Arabidopsis thaliana, AtPRPL1, affects root hair length but not cell wall composition.

Blocking Wnt/β-catenin signaling with EGF receptor is necessary for proper hair growth.

High energy boosts root hair growth in plants, while low energy stops it.

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

SGK3 is essential for proper hair growth and health.

Wool and hair fibers absorb moisture similarly due to their keratin structure, with the amount of non-crystalline areas affecting the moisture uptake.

Astrotactin proteins are important for brain and skin development and are linked to several neurodevelopmental disorders.

Human hair keratins can form stable nanofiber networks that might help in tissue regeneration.

PGA-4HGF may help treat hair loss by activating hair growth pathways and extending the hair growth phase.

A protein called sFRP4 can slow down hair regrowth.

The study developed a method to analyze ancient hair proteins using very small samples.

Dentin sialoprotein and phosphophoryn are present in rodent hair follicles and may help hair growth and development.

Hair follicle stem cells might help treat traumatic brain injury.

The PLP2 gene affects cashmere fiber quality in goats and is linked to hair growth and loss.

Twisting hair weakens it, but strength can be recovered at low twist levels.

COVID-19 may cause hair loss by affecting hair follicles.

MicroRNA-205 helps hair grow by changing the stiffness and contraction of hair follicle cells.