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Removing external lipids from hair reduces moisture and increases strength, while removing internal lipids decreases water permeability.

African hair has the most lipids, while Caucasian hair is more hydrated and stronger.

Older thin hair is not just thinner but also has different shape, structure, and stiffness.

White hair has less lipid content and absorbs water differently than brown hair.

Hair lipids do not protect against humidity.

MRI can effectively image skin structures noninvasively.

Women with aging signs and heart issues have higher hair loss risk, which may predict shorter lifespan and affect attractiveness.

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

Estrogen replacement can improve skin health in menopausal women but doesn't reverse sun damage or prevent hair loss.

Lipids are important for healthy hair, but their exact role is not fully understood and needs more research.

Atopic dermatitis may have genetic causes and can be treated with pharmacologic methods, glycerin creams, and controlling Staphylococcus aureus colonization.

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

Mutations in the NR3C1 gene cause a rare condition that affects hormone signaling and can lead to various symptoms, with dexamethasone as a treatment option.

Selective breeding caused the unique curly hair in Mangalitza pigs.

Nanoparticulate systems improve drug delivery by controlling release, protecting drugs, changing absorption and distribution, and concentrating drugs in targeted areas.

Inositol and arginine solutions improve hair follicle health and turnover.

Chitosan scaffolds with silver nanoparticles effectively treat infected wounds and promote faster healing.

Hair absorbs molecules differently based on their size, charge, and love for water, and less at higher pH; this can help make better hair products.

Hair absorbs alkali bromide salts and water, affecting its structure, with absorption decreasing at higher temperatures.

Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.

The conclusion suggests a new acne treatment that controls bacteria by reducing water in the skin's pores using sugar-like substances.

Microemulsions could improve how drugs are delivered and absorbed in the body.

Heat transfer in hair is slower in groups of hair, increasing the risk of damage from high-temperature styling tools.

Targeting drugs to hair follicles can treat skin conditions, but reaching deep follicle areas is hard and needs more research.

Genetic defects and UV radiation cause skin damage and aging.

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.

Cholesterol sulfate buildup due to a genetic mutation disrupts the skin barrier, leading to the scaling skin seen in X-linked ichthyosis.

Menopause reduces skin collagen and elasticity, and while estrogen therapy can help, its risks require careful consideration.

Maintaining skin health is crucial for overall well-being and involves protecting against environmental damage and using skincare products.

The study found that combining SHG and OCT effectively monitors skin wound healing in mice.