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Certain skin drugs and topical agents, including some natural extracts and fragrances, can cause allergic reactions. Some hair dyes and extensions, as well as minoxidil, a hair growth treatment, can also cause allergies. Botulinum toxin A can effectively reduce sweat but may have temporary side effects.

A woman with severe hypothyroidism had a rare skin condition usually linked to a different thyroid disease.

Ethnic hair products contain different allergens than nonethnic ones, with fragrance being the most common in ethnic products.

"Clean" shampoos use fewer allergenic preservatives than traditional ones but still contain fragrances, and their actual risk of causing skin reactions is unclear.

In 2007, prostate cancer research improved understanding of risk, diagnosis, and treatment, but also showed heart risks with certain therapies and the need for personalized care.

High levels of prolactin in the blood can be linked to widespread hair loss.

Male pattern baldness is a common hair loss in men caused by genetics and hormones, with treatments including drugs, hair transplants, and hair loss products.

JAK inhibitors are effective in treating various immune-related diseases, not just rheumatoid arthritis.

Six new genetic regions linked to early hair loss also connect to Parkinson's disease and prostate cancer, possibly leading to new treatments.

Alopecia areata involves immune system imbalances that may lead to depression and anxiety.

Hydralazine and minoxidil are blood pressure medications that relax blood vessels, with potential side effects like rapid heartbeat and fluid retention, and are used for severe or pregnancy-related hypertension.

Spironolactone did not make hair thinner in women with excess hair growth.

Finasteride blocks deoxycorticosterone's anticonvulsant effects in infant rats, but indomethacin doesn't.

Finasteride reduces melanin production, possibly treating hyperpigmentation and melanoma, but needs more safety research.

Excessive iodine from a cystic fibrosis supplement can cause hypothyroidism.

Humans lost body hair relatively recently in evolution.

Melanocyte development from neural crest cells is complex and influenced by many factors, and better understanding could help treat skin disorders.

Female mice with disrupted 5α-reductase 1 had significant metabolic issues, including stress response problems, insulin resistance, liver fat buildup, and obesity.

Redheaded people may have evolved to efficiently make vitamin D in areas with less sunlight.

Two young siblings experienced hair loss without hormone issues or other skin problems.

Swiss Holstein cattle with curly, short hair carry genes from the Simmental breed.

Redheaded people have higher levels of a vitamin D precursor, suggesting red hair may be an adaptation for better vitamin D synthesis in areas with less sunlight.

RV3466F lotion significantly reduces hair loss and improves acute telogen effluvium.

Gray-scale ultrasound effectively detects erectile tissue fibrosis in young men with erectile dysfunction after using finasteride.

People with early psychosis eat more calories, saturated fat, and sugar, and the drug olanzapine may lead to eating even more calories.

Genes controlling hair growth and immune response are disrupted in male pattern baldness.

The document concludes that better targeted treatments are needed for wound healing, and single-cell technologies may improve cell-based therapies.

Many COVID-19 survivors experience long-term symptoms but still report satisfactory quality of life and return to work.