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People with chronic hair shedding had much lower vitamin D levels compared to healthy people.

Beard cells, unlike scalp cells, produce growth factors in response to testosterone, which may explain differences in hair growth.

RANKL causes lymph nodes to grow by making certain cells multiply.

Marine microbes could be used in cosmetics for sun protection, skin care, and possibly preventing hair loss.

Non-biologic immunosuppressive drugs are crucial for treating autoimmune and chronic inflammatory skin diseases.

DHEA affects multiple receptors and may help with metabolic issues, but its safety and effectiveness in humans are unclear.

Modulating Cytochrome P450 activity could help develop new skin disease treatments.

Salvia plebeia extract can stimulate hair growth.

Acne can't be cured but can be managed with treatments like benzoyl peroxide and diet changes; it's costly and can lead to scarring and mental health issues.

A new compound shows promise as a topical treatment for hair loss.

The black orchid Brasiliorchis schunkeana produces chemicals that attract certain insects and have potential antimicrobial properties.

A complex of 5-aminolevulinic acid and glycyl-histidyl-lysine peptide may help increase hair count in male pattern hair loss without side effects.

Researchers made two new compounds that could be used for medicine.

New steroid compounds effectively inhibit 5α-reductase and may treat hair loss.

Some ovarian tumors can cause masculinization, and it's important to check for various causes when this symptom is present.

Low-dose finasteride effectively treats hirsutism, is safe, and cost-effective.

Some treatments can stabilize Frontal Fibrosing Alopecia, but more research is needed to find effective treatments, and hair transplants often fail.

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 shampoo with cannabidiol can significantly reduce scalp inflammation and symptoms in people with mild to moderate psoriasis or seborrheic dermatitis.

The document concludes that the 5 alpha-reductase enzymes are important in steroid metabolism and related to various human diseases, with inhibitors used to treat conditions like male pattern baldness and prostate issues.

5α-reductase inhibitors, like finasteride and dutasteride, effectively treat BPH, male baldness, and hirsutism, with potential for acne and prostate cancer prevention.

Type 3 5α-reductase is more common and finasteride and dutasteride strongly inhibit it.

Rat skin takes up and processes testosterone differently than other organs, with testosterone being more important for the skin than its metabolite 5α-DHT.

PNU 157706 is a more effective treatment than finasteride for conditions caused by DHT, like enlarged prostate and hair loss.

A girl with rickets and hair loss was found to have a rare condition where her body didn't respond to vitamin D treatment.

Antiandrogens, particularly flutamide and CPA, are most effective for treating hirsutism, with long-term use needed for best results.

Choline and biotin are important for liver health and preventing certain deficiencies in animals, and more research is needed to understand their benefits in humans.

Taking riboflavin and eating less lysine can help some people with a specific genetic disorder avoid brain damage.

Treatment can improve survival and symptoms in dogs with Cushing's disease, but outcomes are unpredictable.

Biotin supplements improved skin and hair problems in a girl with biotinidase deficiency.