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Redheaded people have higher levels of vitamin D precursor, suggesting their hair color may be an adaptation to low sunlight areas.

Using A132 hair dye with sunlight can cause skin damage and hair loss.

Chitin and chitosan are useful in cosmetics for oral care, haircare, and skincare, including UV protection and strength improvement.

Lipids are crucial for maintaining hair structure and health.

Chemical treatments and UV radiation severely damage the lipid layer on hair.

Orobanche rapum extract rejuvenates skin and protects skin bacteria, leading to healthier skin.

Silibinin-loaded micelles significantly protect hair from UV-B damage.

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

Keratin 17 is modified by RSK1 in response to growth and stress, affecting skin growth and stress response.

Psoriasis or contact dermatitis can override alopecia areata, allowing hair growth.

Oestrogens help maintain healthy skin, heal wounds, and may protect against skin aging and cancer.

Liposomes could improve how skin care products work but are costly and not very stable.

A child with trichothiodystrophy also had autoimmune thyroiditis and anemia, which is a new finding.

Human hair provides more UV protection when aligned and at higher angles, but the scalp still gets UV exposure.

The study found that skin inflammation and immune response pathways are activated in Solar Urticaria patients after UV exposure, unlike in healthy people.

UV photography can help identify people at higher risk for skin cancer, and male pattern baldness at age 45 is linked to a higher risk of certain skin cancers.

Hair fluorescence intensity can measure radiation exposure effectively.

UV-induced autofluorescence is effective for identifying different types of alopecia.

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

Men with male pattern baldness have a higher risk of certain skin cancers, especially on the scalp.

The conclusion is that hair loss in women is caused by a mix of hormonal, environmental, and genetic factors, and treatments should target these various causes.

Researchers created a mouse with the same mutation as humans with trichothiodystrophy, showing similar symptoms and confirming the condition is due to defects in DNA repair and gene activity.

Different types of sun exposure damage skin cells and immune cells, with chronic exposure leading to more severe and lasting damage.

Different types of sun exposure can damage skin cells and affect healing, with chronic exposure being more harmful, and certain immune cells help in the repair process.

Grape seed extract is good for skin care, with antioxidant, anti-inflammatory, and anti-cancer effects.

Trichoscopy is a useful tool for diagnosing different hair and scalp diseases without surgery.

Skin aging reflects overall body aging and can indicate internal health conditions.

X-ray microscopy can non-invasively show hair structure changes after treatments, but it's less detailed than TEM and needs improvement.

Hair acts as a significant natural sun barrier, with protection increasing based on hair density, thickness, and melanin presence.

Hydrogen peroxide is the main risk factor for melanoma in swimmers, not UV light.