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Low doses of some substances can be beneficial, while high doses can be harmful or toxic.

A genetic region near the PAX1 gene is linked to a higher risk of scoliosis in females.

Increased DHT formation in skin can cause hair loss, acne, and excessive hair growth, and antiandrogens might treat these conditions.

Lizards can regrow their tail scales with the same structure, distribution, and gender-specific features as the original ones, and this unique ability is not seen in adult mammals.

Marine organisms can improve health and prevent diseases through their use in foods and medical products.

The testes produce important hormones like testosterone and others that play key roles in male body functions.

Lifestyle changes can improve skin health and reduce disease symptoms.

Hormones significantly influence hair growth, with conditions like hirsutism and patterned hair loss linked to hormone levels; more research is needed for full understanding.

In 2019, dermatology and venereology improved skin cancer imaging, advanced in treating skin conditions like psoriasis, and explored the skin microbiome's role in diseases.

As women age, they experience changes in hair density and volume, face challenges in distinguishing normal hair loss from disease, and have limited access to treatments for hair issues.

The document concludes that there are various treatments for different types of alopecia, but more research is needed for evidence-based treatments.

Dutasteride is effective for treating prostate enlargement and reducing related surgery risk, but is not approved for preventing prostate cancer.

A vaccine may prevent benign prostatic hyperplasia (BPH).

Neutered ferrets often develop hyperadrenocorticism, with symptoms like hair loss and lethargy, and androstenedione is a key indicator for diagnosis.

Testosterone treatment effectively causes male physical development in transgender male adolescents but may lead to side effects like acne, higher BMI and blood pressure, lower good cholesterol, and decreased bone density.

Hair loss patterns differ between males and females due to 5 master regulators and JAK-STAT signaling affects hair growth.

5α-reductase inhibitors can cause sexual problems, higher risk of aggressive prostate cancer, and depression.

Higher fluoride levels may delay puberty in boys.

The document concludes that better research methods are needed in men's sexual health to provide stronger evidence and improve patient care.

Human skin makes sexual hormones that affect hair growth, skin health, and healing; too much can cause acne and hair loss, while treatments can manage these conditions.

Dutasteride and finasteride do not significantly affect bone density, blood fats, or blood production, but slightly lower PSA levels and minimally impact sexual function in healthy young men.

5-alpha reductase inhibitors can cause sexual side effects like erectile dysfunction and reduced sexual desire, sometimes lasting after stopping the drug.

Men taking 5α-reductase inhibitors for enlarged prostate have a higher chance of experiencing reduced sexual desire and erectile dysfunction.

Hormones and sex affect potassium channel gene expression in electric fish, influencing their communication signals.

Women with congenital adrenal hyperplasia (CAH) have more sexual function issues than those with polycystic ovary syndrome (PCOS), but physical activity can improve sexual functioning in all women.

The hypothesis suggests that PCOS may start early in life due to genetic and environmental factors, influencing future reproductive and metabolic problems.

Knowing about finasteride's sexual side effects increases reported dysfunction.

Hair, teeth, and mammary glands develop similarly at first but use different genes later.

5α-reductase inhibitors increase the risk of sexual dysfunction, especially in men with enlarged prostate.

MicroRNAs are crucial for controlling skin development and healing by regulating genes.