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Light scatters differently from elliptical hair fibers than from circular ones, and a new model better predicts this behavior, especially for shiny highlights.

Procyanidin B-2 is safe to use on skin as a hair growth product.

The model can effectively test gene functions and drug responses in human skin.

Collagen fibrils in mink skin change structure during hair growth, becoming looser and thicker in the active phase.

Dihydrotestosterone affects hair growth by changing the Wnt/β-catenin pathway, with low levels helping and high levels hindering growth.

A stable emulsion made with plant extracts and oils was effective in stimulating hair growth.

Frequent use of chemical hair relaxants is linked to increased scarring hair loss in Nigerian women.

Medium lipophilic substances penetrate skin best, and adding ethanol can increase delivery to hair follicles.

Mothers and newborns with dental fillings had higher mercury in their hair, but getting fillings during pregnancy didn't raise mercury levels further.

Growth factors and microneedle therapy increase hair density in women with hair loss.

Premature greying of hair is common among young people at King Faisal University, especially females, and is linked to health issues, lifestyle, and family history.

Men's hair loss is not linked to their sex hormone levels, except for lower DHEAS in those with hair loss.

Pregnancy-related stress may cause hair loss in women in their third trimester.

Many college students experience mild hair loss, influenced by factors like gender, family history, and lifestyle, suggesting a need for health education.

Men seeking hair transplants show higher perfectionism and body dysmorphic disorder symptoms.

Mothers and newborns with dental fillings have higher mercury in their hair, but adding fillings during pregnancy doesn't raise mercury levels further.

Synthetic hair fibers for hair restoration were controversial in 2009 due to health risks and lack of support from the International Society of Hair Restoration.

Herbal hair gel with fenugreek seed extract was found to increase hair growth.

Polyunsaturated fatty acids, like arachidonic acid and eicosapentaenoic acid, can promote hair growth and may help treat hair loss.

Hair and wool have complex microscopic structures with microfibrils and varying cystine content.

Glycogen metabolism is important for energy and processes in human hair follicles, and hair follicles may produce glucose from lactate.

Stabilizing HIF1A in hair follicles increases glycolysis, which may help reduce oxidative stress and support hair growth.

Hair follicle stem cells can change their role to ensure proper hair development.

The document explains how to identify different hair problems using a microscope.

Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.

A substance called TCQA could potentially darken hair by activating certain genes and increasing melanin.

The research identified genes that explain why some sheep have curly wool and others have straight wool.

STAT3 signaling is important for healthy skin and hair follicles, and its disruption can lead to skin conditions like atopic dermatitis.

Gamma rays did not change hair follicle density but increased white and hypopigmented hairs in mice.

Asian hair is generally straight and thick, with unique disorders and properties, and more research is needed to understand it fully.