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The document explains hair and nail biology, common hair loss conditions and treatments, oral and genital skin diseases, and the risks and treatments associated with squamous cell carcinoma.

Alzheimer's patients have higher levels of certain chemicals in their hair.

Bright light during the day doesn't change most human clock genes but may slightly increase Rev-erb-ß.

Melatonin in the skin helps protect against damage from stress and UV rays, and could be used to treat certain skin conditions.

The circadian clock influences the behavior and regeneration of stem cells in the body.

Brain-Derived Neurotrophic Factor (BDNF) slows down hair growth and promotes hair follicle regression.

Hormones control reproduction and are crucial for body balance.

Sleep problems and skin issues affect each other; poor sleep can worsen skin conditions, and some skin treatments can improve or harm sleep quality.

Some patients taking finasteride or dutasteride may have ongoing sexual problems and depression even after stopping the medication.

Kids with alopecia areata may experience more stress but not necessarily feel more anxious or depressed than others.

The document suggests medicine should integrate biological and cultural factors and focus on holistic, equitable care.

Scientists have made progress in creating replacement teeth, hair, and glands that work, which could lead to new treatments for missing teeth, baldness, and dryness conditions.

Certain proteins and their receptors are more active during the growth phase of human hair and could be targeted to treat hair disorders.

Carboxytherapy can improve skin conditions with few side effects, but results may vary and are not guaranteed.

Stephen Rothman made important discoveries in dermatology, including the use of PABA in sunscreens, but never profited from his work.

Cyclosporin A promotes hair growth in mice and increases a protein linked to hair growth, but it may not work the same way in humans.

Cancer survivors often experience worse skin problems from treatment than expected, and working with dermatologists could help improve their condition.

Traditional Chinese Medicine and acupuncture may improve Polycystic Ovarian Syndrome symptoms and reduce costs, but more research is needed.

People in Jeddah know about Vitamin D and its sources but are unclear on how much they need daily, and while many women take supplements, attitudes towards increasing Vitamin D levels vary.

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

Different hair follicles in the skin are innervated by unique combinations of mechanosensory neurons, crucial for touch sensation.

PCOS management includes lifestyle changes and medications, with ongoing research into repurposed drugs for better treatment options.

Hair thinning causes stem cell loss through a process involving Piezo1, calcium, and TNF-α.

Taurine is important for many body functions and its deficiency can cause health problems.

Light can activate hair growth through a pathway from the eyes to hair follicles.

Researchers found a substance in chicken egg yolk that helps hair grow.

STIM1 is essential for sweat secretion.

The keratin network in mouse skin changes during cornification and affects the skin's protective barrier.

People with alopecia areata have higher levels of a heart disease marker in their blood.

Sensitive scalp has higher pH, more redness, abnormal sebum, and altered bacterial makeup.