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Coloring shampoos for gray hair may cause gene mutation, reproductive issues, and skin damage, needing stricter regulation and expert consultation.

Hair conditioners with argan oil or camellia oil improve the strength and color of bleached hair.

The method can identify minerals in hair from water, and using coconut oil or conditioner can prevent mineral buildup.

A new hair treatment using a natural polyphenol complex improves hair strength, reduces static, and protects against UV damage.

Low levels of vitamin B12 and ferritin are linked to early hair graying.

Chemical treatments and light exposure damage hair proteins.

Silicone pretreatment protects hair from damage and reduces color fading without interfering with bleaching or dyeing.

Procyanidin oligomers can protect hair from oxidative damage and could be good for hair care products.

Genetics, stress, and health issues can cause early hair greying, which affects self-esteem, and there's no cure, only hair dye.

Men's hair loss is caused by hormones and genes, and can be treated with medication and surgery, while graying is due to aging and has no prevention except dyeing.

Hair grays due to oxidative stress and fewer functioning melanocytes.

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

DVI provides detailed 3D imaging of hair and shows how various products protect and enhance hair.

Human hair structure varies by ethnicity, and certain treatments can improve hair condition and appearance.

Hair ages due to genetics and environmental factors, leading to graying and thinning, with treatments available for some conditions.

Effective treatments for premature hair graying still require significant research.

Henna mixed with PPD can cause skin reactions, scarring, and a specific type of baldness, and needs more research to understand these effects.

Reducing copper (II) ion levels in hair can decrease hair damage.

Repeated hair dyeing significantly damages hair.

Ethosomes improve black tea extract absorption in hair dye.

Hair greying is seen as a sign of aging; temporary fixes like hair dye are used, but a balanced diet and hair care can help manage it.

Hair dye ingredient PPD causes cell death and aging in human hair cells by altering microRNA levels.

Hair health is influenced by genetics, aging, and environmental factors, with proper care needed to maintain it.

Glutamine metabolism affects hair stem cell maintenance and their ability to change back to stem cells.

Ultraviolet rays damage hair, smoking may cause hair loss, and good nutrition is important for hair health, but genetics mainly decide hair thickness.

Chemical and physical treatments like bleaching, dyeing, and UV radiation damage both Caucasian and Afro-ethnic hair.

Hair can't be reliably repaired once damaged; prevention and proper product use are key to maintaining hair health.

Cosmetic procedures can harm hair, but damage can be minimized with knowledge and care; however, once hair is damaged, it cannot be reliably repaired.

Certain skin drugs and topical agents, including some natural extracts and fragrances, can cause allergic reactions. Some hair dyes and extensions, as well as minoxidil, a hair growth treatment, can also cause allergies. Botulinum toxin A can effectively reduce sweat but may have temporary side effects.

Nanotechnology improves hair care products by enhancing ingredient stability, targeting treatment, and reducing side effects, but more research on its toxicity is needed.