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The conclusion is that a new method to measure hair shine was confirmed to match people's visual assessments.

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

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.

Too much zinc in the diet can cause hair loss and color change in young mice by reducing copper in the body.

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.

Hair absorbs molecules differently based on their size, charge, and love for water, and less at higher pH; this can help make better hair products.

Proteins like BSA and keratin can effectively style hair and protect it, offering eco-friendly alternatives to chemical products.

Blocking prolactin increases the activity of secondary hair follicles in cashmere goats.

Many products for hair re-growth exist, but a perfect treatment without side effects has not yet been found.

PEI diffuses into hair at a constant rate, and urea speeds up this process.

Heat transfer in hair is slower in groups of hair, increasing the risk of damage from high-temperature styling tools.

Chemical treatments on bleached black hair change its internal structure by breaking and reforming bonds, and treatments with hydrolyzed eggwhite protein help repair it.

The protein Gnαs is found more in black mice than white mice and may influence their coat color.

The PIP5K1A gene helps cashmere growth in goats by promoting cell proliferation, and melatonin boosts its expression.

16-MHA can restore the barrier and moisture of damaged hair, making it similar to undamaged hair.

Keratin-associated proteins have ancient origins and were used for different purposes before being adapted for hair in mammals.

The document concludes that understanding hair biology is key to treating hair disorders, with gene therapy showing potential as a future treatment.

Human skin can make serotonin and melatonin, which help protect and maintain it.

Stress can cause hair loss by negatively affecting hair follicles and this effect might be reversed with specific treatments.

Ozone reacts more with unwashed hair, producing compounds due to scalp oils, which could lower ozone exposure but increase exposure to reaction products.

Children with loose anagen hair have easily pluckable hair due to root sheath problems, and it might improve without treatment.

Androgenetic alopecia involves genetics, hormones, and can be treated with medications or surgery.

The 190-kbp domain contains all human type I hair keratin genes, showing their organization and evolution.

The study identified and characterized new keratin genes linked to hair follicles and epithelial tissues.

Caucasian women's hair appears thickest in their 20s, with perceived thinning after mid-30s due to both decreasing density and diameter.

Environmental factors at different levels control hair stem cell activity, which could lead to new hair growth and alopecia treatments.

The document concludes that understanding hair follicle cell cycles is crucial for hair growth and alopecia research, and recommends specific techniques and future research directions.

Menopause-related hormonal changes affect hair but are not the only cause of hair changes in middle-aged women.

Prolactin may affect hair growth differently based on gender and scalp area.

Most hair loss in children is caused by a few common conditions, and it's important to diagnose these properly and support the child's mental health.