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Lightly perming scalp hair can lead to new hair growth, potentially treating baldness.

Cortisone may help hair regrow by altering the local environment, with regrowth starting 3-4 weeks after treatment, but its use is not widely recommended.

Cosmetic treatments like bleaching and perming can greatly reduce opiate levels in hair, possibly leading to false-negative drug tests.

Bleaching hair causes significant damage by breaking down proteins and fatty acids.

Valproic acid can cause reversible hair curling and persistent hair thinning.

Certain diseases like AIDS and lupus can make African hair become silky.

Chemical hair straightening significantly reduces detectable drug levels in hair.

Hair and wool strength is affected by the number and type of bonds in their protein structures, with hair having more protein aggregates than wool.

Permed hair degrades faster and shows more damage after protease treatment compared to untreated hair.

Ethnic differences in hair and skin are significant and under-researched, requiring tailored dermatologic treatments and more study.

Washing permed hair after using thioglycolic acid helps reform strong bonds, making hair stronger.

Nanostructured lipid carriers can effectively repair hair split-ends for over 3 days.

Hair properties change under electromagnetic fields and are influenced by individual characteristics and the environment.

Scientists found a new, less invasive way to study body clocks using hair cells, which shows shift workers' body clocks don't match their lifestyles.

The document concludes that understanding hair structure is key to diagnosing hair abnormalities and recommends gentle hair care for management.

Certain growth factors can promote hair growth in mice by activating hair growth-related proteins.

Hedgehog signaling helps keep hair follicle stem cells the same in both young and old human skin.

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

A hair-straightening product caused widespread hair loss and scalp injuries, mainly affecting African American women.

The article concludes that advancements in hair cosmetics require dermatologists to stay informed about products and their potential risks, including allergies and higher risks for hairdressers.

Better hair care products are needed to protect against grooming and chemical damage.

Permanent hair dye damages hair but it mostly recovers after 8 weeks; using certain hair care products can help repair it.

Hair loss in women often doesn't follow a pattern, isn't linked to age, may be genetic, and can be related to thyroid issues or other health factors.

Human leukocytes and beard hair follicle cells have internal daily clocks, and PER1 and PER3 genes may indicate individual circadian rhythms.

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.

Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.

Autoimmune diseases can cause hair loss, and early treatment is important to prevent permanent damage.

Acquired Progressive Kinking of Hair is likely an early sign of male pattern baldness.

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.

Aging makes hair thinner and rougher, with less clear edges.