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As people age, their hair follicles produce less pigment, leading to gray and white hair, due to factors like reduced enzyme activity and damage to melanocyte DNA.

Scalp dermoscopy is good for diagnosing a type of hair loss and helps choose the best spots for biopsy.

Androgenetic alopecia in women needs more research and better management strategies.

Finasteride treats enlarged prostate and hair loss, but may cause side effects in some patients.

Male pattern hair loss could hint at androgens affecting COVID-19 severity.

Men with low testosterone should be carefully evaluated and monitored before and during treatment.

Minoxidil can help grow hair in mice by making cells grow and improving hair quality. More research needed.

Women with PCOS and higher androgen levels are more likely to have fatty liver disease.

Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.

Smoking harms the skin, causing early aging and increasing cancer risk, but stopping smoking can improve skin health.

Analyzing trace elements in human hair is complex and needs a standardized method.

Basal cell carcinoma may start from parts of tiny hair follicles.

Recombinant cytokine therapy can cause skin reactions ranging from mild to severe.

Certain immune cells in the skin release a protein that stops hair growth by keeping hair stem cells inactive.

5α-reductase is essential for male sexual development and its inhibitors have potential in treating various conditions related to hormone action.

Blocking GABA(A) receptors increases neuron sensitivity, showing GABA and glycine have different roles in pain.

Smaller nanoemulsions can penetrate skin and hair follicles better, which may be useful for delivering drugs and vaccines through the skin.

Hair loss in women is common, starts in late 20s, and affects 30% of women over 50.

Alopecia areata is likely caused by a combination of genetic factors and immune system dysfunction, and may represent different diseases with various causes.

PSENEN gene mutations can cause both Dowling-Degos disease and acne inversa.

There may be a connection between Frontal Fibrosing Alopecia and Lichen Planus Pigmentosus, and more research is needed to confirm this.

Thyroid problems can negatively affect women's reproductive health and pregnancy, and can cause symptoms like fatigue and depression, but not all women with these symptoms need treatment.

Women with androgenic alopecia are more likely to have polycystic ovaries and higher androgen levels, which may indicate PCOS.

All adults have Demodex mites, which vary by region.

Some African American women's central scalp hair loss is linked to genetics and past fungal scalp infections, with more research needed on other causes.

Four genetic risk spots found for hair loss, with WNT signaling involved and a link to curly hair.

Minoxidil and Propecia are the only FDA-approved hair growth drugs, but concerns about side effects lead people to explore herbal alternatives.

TRH stimulates human hair growth and extends the hair growth phase.

Minoxidil and finasteride treat hair loss; more research needed for other options.

Human hair proteins vary by individual, body site, and ethnicity, useful for forensics.