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Certain molecules in hair change with age and could be used for cosmetic treatments.

Human hair protein extracts can protect skin cells from oxidative stress.

Hair cortisol levels can show increased stress during late pregnancy but only for up to six months.

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

Hair growth is controlled by specific gene clusters and proteins, and cysteine affects hair gene expression in sheep.

Menopause-related hormonal changes affect hair but are not the only cause of hair changes in middle-aged women.

PDI helps restore over-bleached hair's strength and structure by attaching special peptides.

Electrostatic interactions mainly stabilize the binding of peptides to hair keratin.

Effective repair of bad hair transplants requires skilled techniques and careful use of donor hair, with strategies like reimplantation and camouflage, and new methods to minimize scarring.

Obstetrician/gynecologists can diagnose and manage female hair loss with careful history taking and examination.

UV radiation damages hair by creating holes and peeling cuticle layers.

Hydrogenated palm oil repairs and conditions damaged hair by preventing swelling.

Proteins like BSA and keratin can effectively style hair and protect it, offering eco-friendly alternatives to chemical products.

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

Platelet-Rich Plasma (PRP), a protein-rich extract from a patient's blood, shows promise in improving hair density, thickness, and quality, but the best method of use and number of treatments needed for noticeable results are still unclear.

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

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

Chamomile extract can protect hair from damage caused by light.

Minoxidil was more effective than laser therapy for hair loss, and the report also highlighted the need for more research on PRP for a different hair loss condition, the impact of social media on alopecia views, and a warning on turmeric causing nail discoloration.

Platelet-rich plasma shows potential for hair growth, but more research is needed to determine the best preparation method.

Uncombable hair syndrome causes frizzy hair and can affect the nervous system, eyes, and ears, often co-occurring with other hair, skin, nail, and teeth conditions, and is linked to three specific gene mutations.

Neonate scalp hair is thinner, lacks a medulla, and has smaller follicles compared to adult hair.

The best results in surgical hair restoration come from careful techniques, optimal use of limited hair supply, correct hair direction, saving hair for key areas, understanding scarring effects, and adjusting hair graft density.

A special microbe helps plants absorb rock phosphate by growing on their root hairs.

Bleaching hair increases cysteic acid levels in a predictable way.

Keratin hydrogels from human hair show promise for tissue engineering and regenerative medicine.

PRP is effective for hair loss and might work better with other treatments, but more research is needed.

Lipids in Japanese hair help maintain glossiness and structure.

The Cell Membrane Complex in hair has both water-attracting and water-repelling layers.

L-cysteine slows down the breaking of bonds in hair due to electrostatic interactions.