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

Hibiscus rosa-sinensis is effective and safe for use in herbal soaps and hair oils, promoting skin and hair health.

The new herbal shampoo is effective, safe, and more affordable than other products.

The hair tonic with cinnamon oil and coconut oil was stable and caused very mild irritation.

Different sizes of keratin peptides can strengthen hair, with smaller ones possibly increasing volume and larger ones repairing damage.

Essential oils are increasingly used in cosmetics for their natural benefits but must be used carefully to avoid skin reactions.

The herbal shampoo is safe, effective, and may reduce hair loss and promote growth.

Homemade hair treatments can significantly lower drug levels in hair, possibly causing false-negative drug tests.

The study found that a polymer treatment changes the charge on hair surfaces, making bleached hair smoother and less porous.

Permanent hair dyes use chemicals that react with hydrogen peroxide to create color.

Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.

Use minoxidil for hair loss; finasteride and dutasteride for men, dutasteride for women.

The supplement may help hair growth and is safe, but more research is needed.

Regenerative cosmetics can improve skin and hair by reducing wrinkles, healing wounds, and promoting hair growth.

Vegan collagen builder improves hair growth, skin smoothness, and reduces wrinkles and pain.

Certain hair straighteners and dyes may increase ovarian cancer risk, especially in African American/Black women.

Hair straightening can damage hair and pose health risks, including exposure to carcinogens and hair loss.

The herbal hair oil with natural extracts can improve hair health and reduce dandruff.

Herbal hair oils with Coconut, Curry leaves, Amla, Fenugreek, and Onion promote hair growth and are safe.

The document concludes that activating hair roots is important for improving hair growth and preventing hair loss.

Herbal hair dyes from tannin-rich plants are effective and safer than synthetic dyes.

Ethnic hair products contain different allergens than nonethnic ones, with fragrance being the most common in ethnic products.

Graphene-based hair dye is a safe, durable, and effective alternative to traditional black hair dyes.

Shampoo B, which uses water-soluble silicone, is better at detangling hair in wet conditions due to its two-layer conditioning film.

Hair stiffness increased by 13.2% after caffeine treatment, validating the Stiffness-Angle Law as an effective measurement method.

The polyherbal hair oil promotes hair growth, reduces hair loss, and is safe to use.

Coffee residue extract significantly boosts hair growth.

Chemical hair straightening improves smoothness and shine but may cause side effects, suggesting a need for safer methods.

Saw palmetto extract reduced hair loss and improved hair growth in people with hair thinning.

Tying a knot can measure hair friction, useful for medical applications.