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

Surfactants in shampoos and conditioners remove some but not all lipids from hair, and more research is needed to understand their full impact.

Infrared spectroscopy can analyze hair for forensic and medical insights.

Hair straightening methods have advanced to improve effectiveness and reduce damage, but still rely on heat and chemicals.

Vitamin E in the diet might help protect against hair loss caused by the chemotherapy drug doxorubicin in rabbits.

Henna dye improves hair cuticle and thickness but effects vary by hair type and health.

Androgenetic alopecia, a common hair loss condition, can be treated with topical minoxidil, oral finasteride, or oral spironolactone, and new treatments like platelet-rich plasma, low-level laser therapy, and janus-kinase inhibitors are being explored.

Dermatologists can accurately detect smaller differences in hair density than previously thought.

Afro-textured hair needs personalized care due to its unique genetic traits.

A specific RNA molecule, circCOL1A1, affects the growth and quality of goat hair by interacting with miR-149-5p and influencing cell growth pathways.

Cornu cervi pantotrichum pharmacopuncture solution helps mice grow hair by increasing hair follicle cell growth and a growth factor important for hair development.

Shampoo with heat-killed Lacticaseibacillus paracasei GMNL-653 improves scalp health and hair growth by changing scalp bacteria.

Human hair has a protective lipid layer that can be damaged by moisture and treatments, affecting hair growth and health.

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

Dr. Umar successfully used softer hair from the nape and around the ear for natural-looking hairlines in 128 patients, with some concerns about hair loss over time.

Oxidation changes human hair by breaking down fats and forming new acidic groups, affecting how it interacts with conditioners and cosmetics.

Tiny particles from skin cells can help grow new hair by activating a specific growth signal during skin healing.

Follicular Unit Hair Transplantation is a method for restoring hair by transplanting individual hair follicles.

Teratoma hair is similar to scalp hair but has a rougher surface and lower adhesive force.

A mushroom extract might reduce hair loss and liver damage caused by certain chemotherapy drugs in animals.

Platelet-rich plasma can help grow more and longer hair by creating new blood vessels.

Male rats grow hair faster than females, and certain hormones can slow or slightly increase hair growth, but not significantly beyond natural rates.

Future hair cosmetics will be safer and more effective.

Melatonin helps Cashmere goats grow more hair by affecting genes and cell signals important for hair and blood vessel development.

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

Melandrium firmum extract helps mice grow hair by blocking a hair loss enzyme and changing hair growth genes.

Male pattern baldness may be caused by factors like poor blood circulation, scalp tension, stress, and hormonal imbalances, but the exact causes are still unclear.

The new hair-dyeing shampoo is safe, colors hair evenly, and strengthens it.

2-deoxy-D-ribose gel may help regrow hair in cases of hair loss.

The new wound dressing helps heal burn wounds and regrow hair by releasing beneficial ions.