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Men and women have different hairline restoration needs, with natural design being more complex for women, and hairline changes being important for transgender individuals' transitions.

Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.

Permanent wave treatment with thioglycolic acid changes hair structure by altering disulfide bonds.

The document concludes that assessing hair follicle damage due to cyclophosphamide in mice involves analyzing structural changes and suggests a scoring system for standardized evaluation.

Modulating BMP activity changes the number, size, shape, and type of ectodermal organs.

The new method can tell how hair fibers react to moisture after treatments.

Microwave plasma treatment improves yak hair dyeing.

Aging involves volume loss, not just gravity and skin changes, and restoring facial volume is key for a youthful look.

Dutasteride and finasteride may reduce sperm count and volume but don't affect movement or shape; effects are reversible after stopping.

Psychotropic drugs can cause hair loss or excessive hair growth.

Dermoscopy shows that diffuse alopecia areata progresses through specific hair growth stages.

Tumescent fluid increases scalp hair angles, which may improve hair transplant results and reduce surgeon fatigue.

Hair loss is common in lupus patients and can be permanent or reversible, depending on the type, with various treatments available.

After menopause, some women lose scalp hair and gain facial hair, with patterns suggesting different underlying causes.

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

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

Scanning electron microscopy revealed four distinct hair root shapes in alopecia areata, suggesting a less invasive diagnostic method.

Hair increases in size when it absorbs water, and treatments like bleaching affect how much water it can take in.

Chemical treatments severely damage hair cuticles, especially in previously treated hair.

Permanent waving weakens hair by altering its protein structure.

Transplanted hair follicles show significant changes after FUE, needing more research.

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

As people age, their hair follicles produce less pigment, leading to gray and white hair, due to factors like reduced enzyme activity and damage to melanocyte DNA.

Pregnancy can cause skin darkening, varicose veins, more sweating, hair growth, hair loss after birth, nail changes, and gum inflammation.

Hormone levels in hair change during pregnancy, with progesterone increasing significantly compared to non-pregnant women.

Hair restoration for East Asians should consider their unique characteristics like head shape, hair thickness, and hair density, and use modified procedures and treatments to minimize scarring and maintain hair density.

Gray hair affects hair's movement and appearance, making it less bouncy and more wavy.

Skin and hair can regenerate after injury due to changes in gene activity, with potential links to how cancer spreads. Future research should focus on how new hair follicles form and the processes that trigger their creation.

Hormonal changes after childbirth and menopause can lead to women's hair loss and facial hair growth, with a need for better treatments.

Different hair types from various ethnic groups affect hair shine due to characteristics like thickness and shape.