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Different types of stem cells exist within individual skin layers, and they can adapt to damage, transplantation, or tumor growth. These cells are regulated by their environment and genetic factors. Tumor growth is driven by expanding, genetically altered cells, not long-lived mutant stem cells. There's evidence of cancer stem cells in skin tumors. Other cells, bacteria, and genetic factors help maintain balance and contribute to disease progression. A method for growing mini organs from single cells has been developed.

Obesity is linked to various skin problems and may increase the risk of skin cancer.

Men generally have more severe COVID-19 cases and higher death rates than women due to biological differences.

Men's sensitivity to male hormones might affect how severe COVID-19 gets for them.

Estrogens help reduce skin aging, and SERMs might offer similar benefits without the risks of hormone therapy.

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

The document concludes that while significant progress has been made in understanding skin biology and stem cells, more research is needed to fully understand their interactions with their environment.

People with PCOS, especially if obese, often have NAFLD, linked to obesity, insulin resistance, and high androgen levels.

South Asian women with PCOS are more likely to have metabolic issues and central obesity, and simple measures like waist size and blood pressure can help identify these risks early.

Hair loss linked to higher heart disease risk in both men and women.

Finasteride with oral contraceptive helps improve hair loss in premenopausal women.

Hirsutism is more linked to high androgen levels than acne or hair loss, and a mix of hormonal tests is best for diagnosis; certain treatments can reduce symptoms.

People with alopecia areata often have other health issues like skin diseases, metabolic syndrome, stomach infections, lupus, anemia, thyroid problems, mental health issues, vitamin D deficiency, and hearing and eye problems.

Iranian veterans exposed to sulfur mustard suffer from long-term skin itching and eye damage, with some risk of skin cancer and ongoing management challenges.

Men over 66 taking medication for prostate enlargement have a higher risk of depression and self-harm, especially in the first 18 months of treatment.

"Christmas tree" pattern helps diagnose female hair loss.

High doses of cyproterone acetate are linked to an increased risk of developing meningioma.

Pregnancy can increase lupus activity, but careful planning and treatment can improve outcomes.

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

Women with PCOS are more likely to suffer from depression, anxiety, and stress.

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

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

People with hair loss, especially those with certain types, have lower zinc levels, and zinc supplements might help.

Dermatologists need to understand African American hair-care practices to better treat their hair and scalp disorders.

Iron deficiency common in women, not always linked to hair loss; more research needed.

Low-dose finasteride may cause lasting sexual dysfunction and suicidal thoughts in young men.

Women with PCOS have fewer activated T cells in their ovarian follicles, which might affect fertility.

People with diabetes or obesity should manage their conditions carefully as they have a higher risk of severe COVID-19.

Cyclosporine A may help treat hair loss by blocking a protein that inhibits hair growth.

Bald men are often viewed more negatively and as older than they really are.